4.2 DesigningStudies. 4.2 Designing Studies.notebook. August 20, 2015
|
|
|
- Morgan Singleton
- 5 years ago
- Views:
Transcription
1 Bellwork: 8/13/15 Comment on each of the following as a potential sample survey question. Is the question clear? Is it slanted toward a desired response? A) Which of the following best represents your opinion on gun control? 1. The government should confiscate our guns. 2. We have the right to keep and bear arms. B) A freeze in nuclear weapons should be favored because it would begin a much needed process to stop everyone in the world from building nuclear war in the future. Do you agree or disagree? 4.2 DesigningStudies Objectives: > DISTINGUISHobservationalstudiesfrom experiments > DESCRIBEthelanguageofexperiments > APPLYthethreeprinciplesofexperimentaldesign > DESIGNcomparativeexperimentsusing completelyrandomizeddesign randomizedblockdesign(whichincludes matchedpairs) Aug 10 2:11 PM Aug 10 2:22 PM Observational Study vs. Experiment Menopause+ hormones = less risk of heart attack? explanatory variable whether a woman took hormones response variable whether a woman had a heart attack lurking variable number of doctor visits, age confounding did the women have fewer heart attacks because they took hormones or because they got better health care? Aug 11 4:03 PM Aug 11 4:04 PM 1
2 ObservationalStudy Observessomecharacteristic Measuresthatcharacteristic HasNOinluenceonthecharacteristicwe measure Allowsustodescribeapopulationintermsof thatcharacteristicwhenouroriginalsampleis random ExperimentalStudy (orjustplainexperiment) Imposessometreatment Measuresresponsestothattreatment Allowsustoinferacause effectrelationship Aug 10 2:22 PM Aug 10 2:23 PM ExtraneousVariables thosenotbeingstudiedwhichmayinluencetheresponse variable Ourgoalistodesigntheexperimentinsuchaway thattheextraneousvariablesoperateequallyonall treatmentgroups Aug 10 2:23 PM Aug 10 2:24 PM 2
3 Observationvs.Experiment LurkingVariable Confounding Deinition: Alurkingvariable isavariablethatisnotamongthe explanatoryorresponsevariablesinastudybutthatmay inluencetheresponsevariable. Confounding occurswhentwovariablesareassociated insuchawaythattheireffectsonaresponsevariable cannotbedistinguishedfromeachother. Aug 10 2:24 PM Aug 10 2:24 PM Aug 12 10:59 AM Aug 12 10:45 AM 3
4 Identify the experimental units/subjects, the explanatory variables, the treatments, and the response variables. Most American adolescents don't eat well and don't exercise enough. Can middle schools increase physical activity among their students? Can they persuade students to eat better? Investigators designed a "physical activity intervention" to increase activity in physical ed classes and during leisure periods throughout the school day. They also designed a "nutrition intervention" that improved school lunches. Each participating school was randomly assigned to one of the interventions, both interventions, or no intervention. The investigators observed physical activity and lunchtime consumption of fat. Experimental Units: Middle schools Explanatory variables: physical activity program and nutrition program Treatments: 1) activity intervention 2) nutrition intervention 3) both interventions 4) neither interventions Response variables: physical activity and lunchtime consumption of fat Aug 12 9:27 AM Aug 12 9:35 AM Principalsof ExperimentalDesign Control byholdingconstantvariableswebelieveeffecttheresponse variable Randomize sothatanyextraneousvariablesarerepresentedinall treatmentgroups Replication byhavingenoughsubjectssothatwecantellareal differencefromachancedifference Aug 10 2:25 PM 4
5 Deinition: Ina completelyrandomizeddesign,thetreatmentsare assignedtoalltheexperimentalunitscompletelyby chance. Someexperimentsmayincludea controlgroup that receivesaninactivetreatment,anexisting baseline treatment,orevennotreatmentwhatsoever! Deinition: Anobservedeffectsolargethatitwouldrarely occurbychanceiscalled statisticallysigniicant. Astatisticallysigniicantassociationindatafroma well designedexperimentdoesimplycausation. Aug 10 2:26 PM Deinition A block isagroupofexperimentalunitsthatareknownbefore theexperimenttobesimilarinsomewaythatisexpectedto affecttheresponsetothetreatments. Ina randomizedblockdesign,therandomassignmentof experimentalunitstotreatmentsiscarriedoutseparatelywithin eachblock. Deinition A matched pairsdesign isarandomizedblockedexperimentin whicheachblockconsistsofamatchingpairofsimilar experimentalunits. Chanceisusedtodeterminewhichunitineachpairgetseach treatment. Laundry Sometimes,a pair inamatched pairsdesignconsistsofasingle unitthatreceivesbothtreatments.sincetheorderofthe treatmentscaninluencetheresponse,chanceisusedto determinewithtreatmentisappliedirstforeachunit. 5
6 Activity: Pulse Rate Question: Are standing pulse rates generally higher than sitting pulse rates? Fizz Laboratories, a pharmaceutical company, has developed a new drug for relieving chronic pain. Sixty patients suffering from arthritis and needing pain relief are available. Each patient will be treated and asked an hour later, "About what percent of pain relief did you experience?" a) Why should Fizz not simply administer the new drug and record the patients' responses? b) Should the patients be told whether they are getting the new drug or a placebo? How would this knowledge probably affect their reactions? Aug 11 9:01 AM Aug 12 9:36 AM The Brigham Young University (BYU) statistics department is performing experiments to compare teaching methods. Response variables include students' final exam scores and a measure of their attitude toward statistics. One study compares two levels of technology for large lectures: standard (overhead projector and chalk) and multimedia. There are 8 lecture sections of a basic statistics course at BYU, each with about 200 students. There are four instructors, each of whom teaches two sections. a) Suppose we randomly assign two lecturers to use standard technology in their sections and the other two lecturers to use multimedia technology. Explain how this could lead to confounding. b) Describe a better design for this experiment. a) Every instructor has his/her own teaching style. If we assign it this way, and we find a difference between the two sets of sections, we will not know if the difference is due to technology or instructor. b) Use the instructors as blocks since each instructor teaches two sections. In one randomly chosen section, they would use standard technology and the other they would use multimedia. Aug 12 9:41 AM Aug 12 9:44 AM 6
7 Aug 13 12:55 PM 7
aps/stone U0 d14 review d2 teacher notes 9/14/17 obj: review Opener: I have- who has
aps/stone U0 d14 review d2 teacher notes 9/14/17 obj: review Opener: I have- who has 4: You should be able to explain/discuss each of the following words/concepts below... Observational Study/Sampling
Quiz 4.1C AP Statistics Name:
Quiz 4.1C AP Statistics Name: 1. The school s newspaper has asked you to contact 100 of the approximately 1100 students at the school to gather information about student opinions regarding food at your
Topic 5 Day 2. Homework #2: Saint John's Wort
Today's Agenda: 1. Hand back and go over Topic 4 Quizzes 2. Hand back and go over exit slips 3. Correct and collect Activities 5 7, 5 17 & 5 23 4. Activity 5 4 5. Activity 5 8. Activity 5 7. Topic 5 Preliminaries
AP Statistics Exam Review: Strand 2: Sampling and Experimentation Date:
AP Statistics NAME: Exam Review: Strand 2: Sampling and Experimentation Date: Block: II. Sampling and Experimentation: Planning and conducting a study (10%-15%) Data must be collected according to a well-developed
Villarreal Rm. 170 Handout (4.3)/(4.4) - 1 Designing Experiments I
Statistics and Probability B Ch. 4 Sample Surveys and Experiments Villarreal Rm. 170 Handout (4.3)/(4.4) - 1 Designing Experiments I Suppose we wanted to investigate if caffeine truly affects ones pulse
More Designs. Section 4.2B
More Designs Section 4.2B Block A group of experimental units or subjects that are known before the experiment to be similar in some way that is expected to systematically affect the response to the treatments.
CHAPTER 9: Producing Data: Experiments
CHAPTER 9: Producing Data: Experiments The Basic Practice of Statistics 6 th Edition Moore / Notz / Fligner Lecture PowerPoint Slides Chapter 9 Concepts 2 Observation vs. Experiment Subjects, Factors,
Collecting Data Example: Does aspirin prevent heart attacks?
Collecting Data In an experiment, the researcher controls or manipulates the environment of the individuals. The intent of most experiments is to study the effect of changes in the explanatory variable
Chapter 4 Review. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.
Name: Class: Date: Chapter 4 Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Use Scenario 4-1. The newspaper asks you to comment on their survey
Designed Experiments have developed their own terminology. The individuals in an experiment are often called subjects.
When we wish to show a causal relationship between our explanatory variable and the response variable, a well designed experiment provides the best option. Here, we will discuss a few basic concepts and
AP Statistics Chapter 5 Multiple Choice
AP Statistics Chapter 5 Multiple Choice 1. A nutritionist wants to study the effect of storage time (6, 12, and 18 months) on the amount of vitamin C present in freeze dried fruit when stored for these
The Practice of Statistics 1 Week 2: Relationships and Data Collection
The Practice of Statistics 1 Week 2: Relationships and Data Collection Video 12: Data Collection - Experiments Experiments are the gold standard since they allow us to make causal conclusions. example,
Chapter 3. Producing Data
Chapter 3. Producing Data Introduction Mostly data are collected for a specific purpose of answering certain questions. For example, Is smoking related to lung cancer? Is use of hand-held cell phones associated
MATH& 146 Lesson 6. Section 1.5 Experiments
MATH& 146 Lesson 6 Section 1.5 Experiments 1 Experiments Studies where the researchers assign treatments to cases are called experiments. When this assignment includes randomization (such as coin flips)
Next, we ll discuss some terminology that is typically used when discussing randomized experiments.
DESIGNING RANDOMIZED COMPARATIVE EXPERIMENTS Recall that in an experimental study design, a researcher manipulates something and then measures the effect of that manipulation on some outcome of interest.
AP Statistics Unit 4.2 Day 3 Notes: Experimental Design. Expt1:
AP Statistics Unit 4.2 Day 3 Notes: Experimental Design OBSERVATION -observe outcomes without imposing any treatment EXPERIMENT -actively impose some treatment in order to observe the response I ve developed
CHAPTER 6. Experiments in the Real World
CHAPTER 6 Experiments in the Real World EQUAL TREATMENT FOR ALL SUBJECTS The underlying assumption of randomized comparative experiments is that all subjects are handled equally in every respect except
Chapter 1: Data Collection Pearson Prentice Hall. All rights reserved
Chapter 1: Data Collection 2010 Pearson Prentice Hall. All rights reserved 1-1 Statistics is the science of collecting, organizing, summarizing, and analyzing information to draw conclusions or answer
3.2 Designing Experiments
3.2 Designing Experiments Definition. An observational study observes individuals and measures variables of interest but does not attempt to influence the responses. An experiment, on the other hand, deliberately
Chapter 3 Producing Data
Chapter 3 Producing Data 3.1 Introduction How to get data? Available data: from the library and internet produced in the past for some other purpose but may help answer a present question. Produce data
A) I only B) II only C) III only D) II and III only E) I, II, and III
AP Statistics Review Chapters 13, 3, 4 Your Name: Per: MULTIPLE CHOICE. Write the letter corresponding to the best answer. 1.* The Physicians Health Study, a large medical experiment involving 22,000 male
Name: Class: Date: 1. Use Scenario 4-6. Explain why this is an experiment and not an observational study.
Name: Class: Date: Chapter 4 Review Short Answer Scenario 4-6 Read the following brief article about aspirin and alcohol. Aspirin may enhance impairment by alcohol Aspirin, a long time antidote for the
Chapter 9. Producing Data: Experiments. BPS - 5th Ed. Chapter 9 1
Chapter 9 Producing Data: Experiments BPS - 5th Ed. Chapter 9 1 How Data are Obtained Observational Study Observes individuals and measures variables of interest but does not attempt to influence the responses
Experiments. 22S:30/105 Statistical Methods and Computing. Recall: What is the critical difference between an experiment and an observational
22S:30/105 Statistical Methods and Computing Designing Experiments Lecture 8 February 13, 2015 Kate Cowles 374 SH, 335-0727 kate-cowles@uiowa.edu 1 2 Experiments Recall: What is the critical difference
Chapter 13 Summary Experiments and Observational Studies
Chapter 13 Summary Experiments and Observational Studies What have we learned? We can recognize sample surveys, observational studies, and randomized comparative experiments. o These methods collect data
4.2: Experiments. SAT Survey vs. SAT. Experiment. Confounding Variables. Section 4.2 Experiments. Observational Study vs.
4.2: s SAT Survey vs. SAT Describe a survey and an experiment that can be used to determine the relationship between SAT scores and hours studied? Section 4.2 s After this section, you should be able to
Daily Agenda. Honors Statistics. 1. Check homework C4#9. 4. Discuss 4.3 concepts. Finish 4.2 concepts. March 28, 2017
Honors Statistics Aug 23-8:26 PM Daily Agenda 1. Check homework C4#9 Finish 4.2 concepts 4. Discuss 4.3 concepts Aug 23-8:31 PM 1 Apr 6-9:53 AM Nov 11-12:33 PM 2 Lack of BLINDING... The same person "experimenter"
Chapter 13. Experiments and Observational Studies. Copyright 2012, 2008, 2005 Pearson Education, Inc.
Chapter 13 Experiments and Observational Studies Copyright 2012, 2008, 2005 Pearson Education, Inc. Observational Studies In an observational study, researchers don t assign choices; they simply observe
Chapter 3. Producing Data
Chapter 3 Producing Data Types of data collected Anecdotal data data collected haphazardly (not representative!!) Available data existing data (examples: internet, library, census bureau,.) Gather own
Unit 3: Collecting Data. Observational Study Experimental Study Sampling Bias Types of Sampling
Unit 3: Collecting Data Observational Study Experimental Study Sampling Bias Types of Sampling Feb 7 10:12 AM The step of data collection is critical to obtain reliable information for your study. 2 Types
COMIRB Protocol Number: PI: Madeline Cole, MS-III Michael Chan, MS-III Dan Matlock, MD MPH. Dear Fellow Medical Student,
COMIRB Protocol Number: 13-2387 PI: Madeline Cole, MS-III Michael Chan, MS-III Dan Matlock, MD MPH Dear Fellow Medical Student, We are conducting a study to assess the attitudes and experiences of medical
Chapter 11: Experiments and Observational Studies p 318
Chapter 11: Experiments and Observational Studies p 318 Observation vs Experiment An observational study observes individuals and measures variables of interest but does not attempt to influence the response.
Gathering. Useful Data. Chapter 3. Copyright 2004 Brooks/Cole, a division of Thomson Learning, Inc.
Gathering Chapter 3 Useful Data Copyright 2004 Brooks/Cole, a division of Thomson Learning, Inc. Principal Idea: The knowledge of how the data were generated is one of the key ingredients for translating
Class 1. b. Sampling a total of 100 Californians, where individuals are randomly selected from each major ethnic group.
What you need to know: Class 1 Sampling Study design The goal and importance of sampling methods Bias Sampling frame Volunteer sample Convenience sample Systematic sample Volunteer response Non-response
Observational study is a poor way to gauge the effect of an intervention. When looking for cause effect relationships you MUST have an experiment.
Chapter 5 Producing data Observational study Observes individuals and measures variables of interest but does not attempt to influence the responses. Experiment Deliberately imposes some treatment on individuals
Chapter 9. Producing Data: Experiments. BPS - 5th Ed. Chapter 9 1
Chapter 9 Producing Data: Experiments BPS - 5th Ed. Chapter 9 1 Experiment versus Observational Study Both typically have the goal of detecting a relationship between the explanatory and response variables.
Chapter 1 - Sampling and Experimental Design
Chapter 1 - Sampling and Experimental Design Read sections 1.3-1.5 Sampling (1.3.3 and 1.4.2) Sampling Plans: methods of selecting individuals from a population. We are interested in sampling plans such
Leg cramps and perimenopause
Buscar... Leg cramps and perimenopause Around age 40, women's bodies begin perimenopause, the transition leading to menopause (the point in time when you stop menstruating. Other treatment options for
Mathacle. PSet Stats, Concepts In Statistics Level Number Name: Date:
II. DESIGN OF STUDIES Observational studies and experiments are two types of studies that aim to describe or explain the variation of responses under the hypothesized factors, without or with manipulation.
Review. Chapter 5. Common Language. Ch 3: samples. Ch 4: real world sample surveys. Experiments, Good and Bad
Review Ch 3: samples Sampling terminology Proportions Margin of error Ch 4: real world sample surveys Questions to ask about a study Errors in sample surveys Concerns about survey questions Probability
Chapter 1 Data Collection
Chapter 1 Data Collection OUTLINE 1.1 Introduction to the Practice of Statistics 1.2 Observational Studies versus Designed Experiments 1.3 Simple Random Sampling 1.4 Other Effective Sampling Methods 1.5
50% reduction in strokes
Now, let's look at some health messages. The next three questions are about the following advertisement for an imaginary drug called Gritagrel. Gritagrel 50% reduction in strokes Gritagrel is a new pill
STAT 111 SEC 006 PRACTICE EXAM 1: SPRING 2007
STAT 111 SEC 006 PRACTICE EXAM 1: SPRING 2007 1. You want to know the opinions of American schoolteachers about establishing a national test for high school graduation. You obtain a list of the members
Section Experiments
Section 4.2 - Experiments There are two different ways to produce/gather data in order to answer specific questions: 1. Observational Studies Observes individuals and measures variables of interest but
Chapter 6. Experiments in the Real World. Chapter 6 1
Chapter 6 Experiments in the Real World Chapter 6 1 Thought Question 1 Suppose you are interested in determining if drinking a glass of red wine each day helps prevent heartburn. You recruit 40 adults
Test 1: Professor Symanzik Statistics
Page 1 of 11 1 (6 Points) A researcher wants to learn whether regularly taking chromium picolinate may reduce elevated cholesterol values. The researcher is considering two approaches to study this issue:
Chapter 13. Experiments and Observational Studies
Chapter 13 Experiments and Observational Studies 1 /36 Homework Read Chpt 13 Do p312 1, 7, 9, 11, 17, 20, 25, 27, 29, 33, 40, 41 2 /36 Observational Studies In an observational study, researchers do not
[Source: Freedman, Pisani, Purves (1998) Statistics, 3rd ed., Ch 2.]
![[Source: Freedman, Pisani, Purves (1998) Statistics, 3rd ed., Ch 2.]](/thumbs/76/73157224.jpg "[Source: Freedman, Pisani, Purves (1998) Statistics, 3rd ed., Ch 2.]")
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License. Your use of this material constitutes acceptance of that license and the conditions of use of materials on this
STA Module 1 Introduction to Statistics and Data
STA 2023 Module 1 Introduction to Statistics and Data 1 Learning Objectives Upon completing this module, you should be able to: 1. Classify a statistical study as either descriptive or inferential. 2.
CHAPTER 5: PRODUCING DATA
CHAPTER 5: PRODUCING DATA 5.1: Designing Samples Exploratory data analysis seeks to what data say by using: These conclusions apply only to the we examine. To answer questions about some of individuals
Homework Answers. 1.3 Data Collection and Experimental Design
Homework Answers 2. Ordinal, Interval, Ratio 4. False. You can calculate meaningful differences. 6. False. Data at the ratio level can be put in order. Sep 7 1:51 PM 1.3 Data Collection and Experimental
Surveys knowingly respond
Observational Studies no intervention no treatment Experimental Studies Experiments intervention or treatment Surveys knowingly respond 1 In observational studies or surveys, select randomly so the sample
Chapter 2. The Data Analysis Process and Collecting Data Sensibly. Copyright 2005 Brooks/Cole, a division of Thomson Learning, Inc.
Chapter 2 The Data Analysis Process and Collecting Data Sensibly Important Terms Variable A variable is any characteristic whose value may change from one individual to another Examples: Brand of television
Study Design. Study design. Patrick Breheny. January 23. Patrick Breheny Introduction to Biostatistics (171:161) 1/34
Study design Patrick Breheny January 23 Patrick Breheny Introduction to Biostatistics (171:161) 1/34 in the ideal world In an ideal world, We have a list of everyone in the population of interest We randomly
Collecting Data: Randomized Experiments
STAT 250 Dr. Kari Lock Morgan Collecting Data: Randomized Experiments SECTION 1.3 Randomized Experiments Exercise and the Brain A study found that elderly people who walked at least a mile a day had signibicantly
Sampling Controlled experiments Summary. Study design. Patrick Breheny. January 22. Patrick Breheny Introduction to Biostatistics (BIOS 4120) 1/34
Sampling Study design Patrick Breheny January 22 Patrick Breheny to Biostatistics (BIOS 4120) 1/34 Sampling Sampling in the ideal world The 1936 Presidential Election Pharmaceutical trials and children
Name Date Period. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Chapter 13 Review Name Date Period Write complete answers, using complete sentences where necessary. Show your work when possible. SHORT ANSWER. Write the word or phrase that best completes each statement
Math 124: Modules 3 and 4. Sampling. Designing. Studies. Studies. Experimental Studies Surveys. Math 124: Modules 3 and 4. Sampling.
What we will do today Five Experimental Module 3 and Module 4 David Meredith Department of Mathematics San Francisco State University September 24, 2008 Five Experimental 1 Five 2 Experimental Terminology
The object of an experiment is to prove that A causes B. If I wanted to prove that smoking causes heart issues, what are some confounding variables?
If I wanted to prove that smoking causes heart issues, what are some confounding variables? Beware of Confounding Variables The object of an experiment is to prove that A causes B. a confounding variable
Variable Data univariate data set bivariate data set multivariate data set categorical qualitative numerical quantitative
The Data Analysis Process and Collecting Data Sensibly Important Terms Variable A variable is any characteristic whose value may change from one individual to another Examples: Brand of television Height
Unit notebook May 29, 2015
S.IC.3 S.IC.6 Objective: Students will recognize the purposes of and differences among sample surveys, experiments, and observational studies; explain how randomization relates to each and evaluate reports
SAMPLE. 1. Explain how you would carry out an experiment into the effect playing video games has on alertness.
OCR Research Methods Designing Your Own Investigation In section B (research design and response) of component 1, you will be required to design your own investigation, from a novel source provided. In
Summer AP Statistic. Chapter 4 : Sampling and Surveys: Read What s the difference between a population and a sample?
Chapter 4 : Sampling and Surveys: Read 207-208 Summer AP Statistic What s the difference between a population and a sample? Alternate Example: Identify the population and sample in each of the following
Name Class Date. Even when random sampling is used for a survey, the survey s results can have errors. Some of the sources of errors are:
Name Class Date 8-3 Surveys, Experiments, and Observational Studies Going Deeper Essential question: What kinds of statistical research are there, and which ones can establish cause-and-effect relationships
CHAPTER 4 Designing Studies
CHAPTER 4 Designing Studies 4.2 Experiments The Practice of Statistics, 5th Edition Starnes, Tabor, Yates, Moore Bedford Freeman Worth Publishers Experiments Learning Objectives After this section, you
Research. how we figure stuff out. Methods
Research how we figure stuff out Methods Penny in the Glass Activity Let s Make A Deal! One volunteer is needed for a chance to win $1,334,499! Let s Make A Deal Shows Us That: Human Intuition is highly
Sampling Reminders about content and communications:
Sampling A free response question dealing with sampling or experimental design has appeared on every AP Statistics exam. The question is designed to assess your understanding of fundamental concepts such
Sampling. (James Madison University) January 9, / 13
Sampling The population is the entire group of individuals about which we want information. A sample is a part of the population from which we actually collect information. A sampling design describes
Large Research Studies
Large Research Studies Core Concepts: Traditional large research studies involve collecting and analyzing data related to an independent variable and dependent variable for a large number of research subjects.
Experiments in the Real World
Experiments in the Real World Goal of a randomized comparative experiment: Subjects should be treated the same in all ways except for the treatments we are trying to compare. Example: Rats in cages given
Chapter 1: Statistical Basics
Section 1.1: What is Statistics? You are exposed to statistics regularly. If you are a sports fan, then you have the statistics for your favorite player. If you are interested in politics, then you look
Higher Psychology RESEARCH REVISION
Higher Psychology RESEARCH REVISION 1 The biggest change from the old Higher course (up to 2014) is the possibility of an analysis and evaluation question (8-10) marks asking you to comment on aspects
Health Promoting Practices - Patient follow up survey (Dental)
Health Promoting Practices - Patient follow up survey (Dental) * 1. I recall completing the Health Promoting Practices Health Self-Assessment questionnaire at my dental practice Yes No * 2. Eating at least
Module 4 Introduction
Module 4 Introduction Recall the Big Picture: We begin a statistical investigation with a research question. The investigation proceeds with the following steps: Produce Data: Determine what to measure,
P. 266 #9, 11. p. 289 # 4, 6 11, 14, 17
P. 266 #9, 11 9. Election. a) Answers will vary. A component is one voter voting. An outcome is a vote for our candidate. Using two random digits, 00-99, let 01-55 represent a vote for your candidate,
Chapter 5: Producing Data Review Sheet
Review Sheet 1. In order to assess the effects of exercise on reducing cholesterol, a researcher sampled 50 people from a local gym who exercised regularly and 50 people from the surrounding community
Vocabulary. Bias. Blinding. Block. Cluster sample
Bias Blinding Block Census Cluster sample Confounding Control group Convenience sample Designs Experiment Experimental units Factor Level Any systematic failure of a sampling method to represent its population
Math 140 Introductory Statistics
Math 140 Introductory Statistics Professor Silvia Fernández Sample surveys and experiments Most of what we ve done so far is data exploration ways to uncover, display, and describe patterns in data. Unfortunately,
I can explain how under coverage, nonresponse, and question wording can lead to bias in a sample survey. Strive p. 67; Textbook p.
1 AP Statistics Unit 2 Concepts (Chapter 4) Baseline Topics: (must show mastery in order to receive a 3 or above I can distinguish between a census and a sample I can identify a systematic sample. Textbook
COMMUNITY RESEARCH WORKSHOP
COMMUNITY RESEARCH WORKSHOP Community Research Workshop Activity: Opinions & Attitudes Source: Family Health International, 2004 Tree Metaphor The tree symbolizes strength, healing and fruitfulness in
MAT 155. Chapter 1 Introduction to Statistics. Key Concept. Basics of Collecting Data. August 20, S1.5_3 Collecting Sample Data
MAT 155 Dr. Claude Moore Cape Fear Community College Chapter 1 Introduction to Statistics 1 1 Review and Preview 1 2 Statistical Thinking 1 3 Types of Data 1 4 Critical Thinking 1 5 Collecting Sample Data
Section 4.3 Using Studies Wisely. Honors Statistics. Aug 23-8:26 PM. Daily Agenda. 1. Check homework C4# Group Quiz on
Section 4.3 Using Studies Wisely Honors Statistics Aug 23-8:26 PM Daily Agenda 1. Check homework C4#10 2. Group Quiz on 4.2 4.3 concepts 5. Discuss homework C4#11 Aug 23-8:31 PM 1 pg 262-264: 76, 79, 81,
UNIT I SAMPLING AND EXPERIMENTATION: PLANNING AND CONDUCTING A STUDY (Chapter 4)
UNIT I SAMPLING AND EXPERIMENTATION: PLANNING AND CONDUCTING A STUDY (Chapter 4) A DATA COLLECTION (Overview) When researchers want to make conclusions/inferences about an entire population, they often
Chapter 4: More about Relationships between Two-Variables Review Sheet
Review Sheet 4. Which of the following is true? A) log(ab) = log A log B. D) log(a/b) = log A log B. B) log(a + B) = log A + log B. C) log A B = log A log B. 5. Suppose we measure a response variable Y
Our goal in this section is to explain a few more concepts about experiments. Don t be concerned with the details.
Our goal in this section is to explain a few more concepts about experiments. Don t be concerned with the details. 1 We already mentioned an example with two explanatory variables or factors the case of
Experimental and survey design
Friday, October 12, 2001 Page: 1 Experimental and survey design 1. There is a positive association between the number of drownings and ice cream sales. This is an example of an association likely caused
Hormone Treatments and the Risk of Breast Cancer
Cornell University Program on Breast Cancer and Environmental Risk Factors in New York State (BCERF) Updated July 2002 Hormone Treatments and the Risk of Breast Cancer 1) Hormone Treatment After Menopause
lab exam lab exam Experimental Design Experimental Design when: Nov 27 - Dec 1 format: length = 1 hour each lab section divided in two
lab exam when: Nov 27 - Dec 1 length = 1 hour each lab section divided in two register for the exam in your section so there is a computer reserved for you If you write in the 1st hour, you can t leave
Nutrition Education for ESL Programs LEVEL: BEGINNING HIGH. Nutrition Standard. Content Objective. Behavior Change Objective. Language Objective
Nutrition Education for ESL Programs LEVEL: BEGINNING HIGH Nutrition Standard Key Message #2: Students will continue to eat, or add, fruits and vegetables to their diets to equal USDA recommendations.
In the broadest sense of the word, the definition of research includes any gathering of data, information, and facts for the advancement of knowledge.
What is research? "In the broadest sense of the word, the definition of research includes any gathering of data, information, and facts for the advancement of knowledge." - Martyn Shuttleworth "Research
20. Experiments. November 7,
20. Experiments November 7, 2015 1 Experiments are motivated by our desire to know causation combined with the fact that we typically only have correlations. The cause of a correlation may be the two variables
LAB 4 Experimental Design
LAB 4 Experimental Design Generally speaking, the research design that is used and the properties of the variables combine to determine what statistical tests we use to analyze the data and draw our conclusions.
As technology progresses day by day so, too, must the way we maintain and keep our
Heard 1 Cole Heard Mrs. Chambers Honors Lit 19 October 2016 As technology progresses day by day so, too, must the way we maintain and keep our bodies healthy. The most commonly used ways to help treat
APPLICATION FOR CARE
3023 Eastland Blvd. Suite 101 Clearwater, FL 33761 Ph: 727-797-9900 Fax: 727-797-7695 APPLICATION FOR CARE Date: Name: Address: City, State, Zip: Home Phone: Work Phone: Cell Phone: Email Address: Birth
*Karle Laska s Sections: There is NO class Thursday or Friday! Have a great Valentine s Day weekend!
STATISTICS 100 EXAM 1 Spring 2016 PRINT NAME (Last name) (First name) NETID: CIRCLE SECTION: L1 (Laska MWF 12pm) L2 (Laska Tues/Thurs 11am) Write answers in appropriate blanks. When no blanks are provided
Pennsylvania Department of Health 2003 Behavioral Risks of McKean County Adults Page 1
2003 Behavioral Health Risks Of Adults Collaborative Board Pennsylvania Department of Health 2003 Behavioral Risks of Adults Page 1 Introduction The Centers for Disease Control and Prevention (CDC) and
Patient Information Form
Patient Information Form Patient Name: (Last) (First) (MI) Name you prefer to be called: Patient Address: City: State: Zip: Home Phone: Cellular: Birthdate: Age: Sex: M F Email: Employment Information:
Group exercise participation: National Survey. Gavin Ellison & Fiona Lewis
Group exercise participation: National Survey Gavin Ellison & Fiona Lewis 1. Management Summary 2. Key findings a) Headline participation figures b) Profile of participants c) How they take part d) Satisfaction
STA Module 1 The Nature of Statistics. Rev.F07 1
STA 2023 Module 1 The Nature of Statistics Rev.F07 1 Learning Objectives 1. Classify a statistical study as either descriptive or inferential. 2. Identify the population and the sample in an inferential
STA Rev. F Module 1 The Nature of Statistics. Learning Objectives. Learning Objectives (cont.
STA 2023 Module 1 The Nature of Statistics Rev.F07 1 Learning Objectives 1. Classify a statistical study as either descriptive or inferential. 2. Identify the population and the sample in an inferential