To determine Identify the type of the given study. Explanation Given info: A researcher’s desire is to check whether giving a demo before joining the individuals into a job will result in the measurable physical changes. For this the researcher selected 75 female hotel maids and 41 maids are randomly selected and these maids are informed that their work is good exercise and the other 34 maids are not informed anything. The characteristics of the maids such as weight, body fat, body mass index and blood pressure are measured before and after four weeks of joining in the job. Justification: Reason for correct answer: Experimental study : In a designed experimental study, researchers allocate individuals to a certain group under study and change the values of an explanatory variable intentionally, after which, the values of the response variable for each group is recorded. Here, all the workers who are randomly divided into two groups and each group are randomly assigned to one of two treatments. Where one treatment is giving some information and the other treatment is not telling anything. Workers receiving each group of treatment are kept under consideration after giving the required treatment and the effectiveness of treatment is observed. There is an attempt to influence the subject as the value of explanatory variable is influenced and controlled by researcher under study. Hence, the given study is a designed experiment. Thus, the given statement “The given study is a designed experiment because a randomly selected group was treated differently and the researcher was interested in the effect of that treatment” is correct. Therefore, the option (d) is correct. Reason for incorrect answer: Option (a): Observational Study : An observational study measures the values of a variable without influencing the values of response variables and explanatory variables. Thus, in observational study researchers can observe the behaviors of the individuals without influencing the outcome of that study. Here, the researchers did not collect data on the various measurements for the hotel maids. The researchers influenced the individuals in their respective work. Here, the researcher is conducting an experiment rather than observing from the previous records. Thus, the study is not an observational study. Prospective study : An observational study that is prospective in nature, meaning that it begins by identifying a group of individuals to be considered for the study and then following the individuals over a long period, recording the individuals’ characteristics and exposures over time and finally recording the response variable. Cohort study also called as a prospective study. Here, the four week time period is just the observational time in the experimental design. This alone is not enough for the study to be prospective. As the given study is not observational the discussion of prospective observational study is invalid. Thus, the given statement “The given study is a prospective observational study because it allowed the maids for four weeks” is a flaw. Therefore, the option (a) is incorrect. Option (b): Retrospective study : An observational study which begins at the present period but requires the individuals to use their memory or requires the researcher to go through existing records to gather information, rather than collecting information from current events , is called a retrospective study...

5th Edition

ISBN: 9780135164013

Author: DeVeaux

Publisher: PEARSON CO

See similar textbooks

Concept explainers

Addition Rule of Probability

It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.

Expected Value

When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known …

Probability Distributions

Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosi…

Basic Probability

The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the prob…

Videos

Question

Chapter CR, Problem 8E

To determine

Identify the type of the given study.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter CR, Problem 7E

Chapter CR, Problem 9E

Chapter CR Solutions

Stats: Data and Models

Ch. CR - Prob. 4E Ch. CR - 5. Hospital variables A random sample of 1000...Ch. CR - Prob. 6E Ch. CR - Prob. 7E Ch. CR - Hotel maids A Harvard psychologist recruited 75...Ch. CR - Prob. 9E Ch. CR - 10. The researcher was concerned about whether...Ch. CR - Prob. 11E Ch. CR - Prob. 12E Ch. CR - Prob. 13E

Ch. CR - Prob. 14E Ch. CR - Prob. 15E Ch. CR - Prob. 16E Ch. CR - Prob. 17E Ch. CR - Prob. 18E Ch. CR - Prob. 19E Ch. CR - 21. PVA The Paralyzed Veterans of America (PVA) is...

Knowledge Booster

$Statistics$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Recommended textbooks for you

MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman

MATLAB: An Introduction with Applications

Statistics

ISBN:9781119256830

Author:Amos Gilat

Publisher:John Wiley & Sons Inc

Probability and Statistics for Engineering and th...

Statistics

ISBN:9781305251809

Author:Jay L. Devore

Publisher:Cengage Learning

Statistics for The Behavioral Sciences (MindTap C...

Statistics

ISBN:9781305504912

Author:Frederick J Gravetter, Larry B. Wallnau

Publisher:Cengage Learning

Elementary Statistics: Picturing the World (7th E...

Statistics

ISBN:9780134683416

Author:Ron Larson, Betsy Farber

Publisher:PEARSON

The Basic Practice of Statistics

Statistics

ISBN:9781319042578

Author:David S. Moore, William I. Notz, Michael A. Fligner

Publisher:W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:9781319013387

Author:David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:W. H. Freeman

SEE MORE TEXTBOOKS

Probability & Statistics (28 of 62) Basic Definitions and Symbols Summarized; Author: Michel van Biezen;https://www.youtube.com/watch?v=21V9WBJLAL8;License: Standard YouTube License, CC-BY

Introduction to Probability, Basic Overview - Sample Space, & Tree Diagrams; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=SkidyDQuupA;License: Standard YouTube License, CC-BY