Stats: Modeling the World Nasta Edition Grades 9-12
3rd Edition
ISBN: 9780131359581
Author: David E. Bock, Paul F. Velleman, Richard D. De Veaux
Publisher: PEARSON
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Chapter 13, Problem 14E
a)
To determine
To find the type of the study.
a)
Expert Solution
Answer to Problem 14E
This is an experimental study.
Explanation of Solution
First need to understand about the experimental study and observational study:
Experimental study: Assigning people or things to groups and applying some treatment to one group, while the other group does not receive the treatment.
Observation study: In an observational study, measure or survey members of a sample without trying to affect them.
This is an experimental study because the treatment is imposed on the subjects. That is, all the subjects were exposed to a cold virus and then received a herbal compound or sugar solution.
b)
To determine
To find the subjects.
b)
Expert Solution
Answer to Problem 14E
The volunteers exposed to a cold virus.
Explanation of Solution
The subjects are volunteers who exposed to a cold virus.
c)
To determine
To find the factors and number of levels.
c)
Expert Solution
Answer to Problem 14E
Herbal compound with 2 levels.
Explanation of Solution
In this study, the experiment having 1 factor which have 2 levels. The levels are herbal compound and sugar solution.
d)
To determine
To find the number of treatments.
d)
Expert Solution
Answer to Problem 14E
2
Explanation of Solution
In this study, there are 2 treatments.
e)
To determine
To find the response variable.
e)
Expert Solution
Answer to Problem 14E
The response variable is cold severity.
Explanation of Solution
In this study, the response variable is severity of cold symptoms.
f)
To determine
To identify the type experiment.
f)
Expert Solution
Answer to Problem 14E
Completely randomized experiment.
Explanation of Solution
The experiment is completely randomized because subjects were randomly assigned to a treatment.
g)
To determine
To identify whether the study is blinded or double blinded.
g)
Expert Solution
Answer to Problem 14E
The experiment is not blinded.
Explanation of Solution
The experiment is Blinding, because the sugar solution was used as a placebo which helps to knowing whether they had received the herbal compound.
h)
To determine
To explain the scope and conclusions.
h)
Expert Solution
Explanation of Solution
There is no evidence that the herbal compound was more effective than the sugar solution.
Chapter 13 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
Ch. 13 - Prob. 1ECh. 13 - Prob. 2ECh. 13 - Prob. 3ECh. 13 - Prob. 4ECh. 13 - Prob. 5ECh. 13 - Prob. 6ECh. 13 - Prob. 7ECh. 13 - Prob. 8ECh. 13 - Prob. 9ECh. 13 - Prob. 10E
Ch. 13 - Prob. 11ECh. 13 - Prob. 12ECh. 13 - Prob. 13ECh. 13 - Prob. 14ECh. 13 - Prob. 15ECh. 13 - Prob. 16ECh. 13 - Prob. 17ECh. 13 - Prob. 18ECh. 13 - Prob. 19ECh. 13 - Prob. 20ECh. 13 - Prob. 21ECh. 13 - Prob. 22ECh. 13 - Prob. 23ECh. 13 - Prob. 24ECh. 13 - Prob. 25ECh. 13 - Prob. 26ECh. 13 - Prob. 27ECh. 13 - Prob. 28ECh. 13 - Prob. 29ECh. 13 - Prob. 30ECh. 13 - Prob. 31ECh. 13 - Prob. 32ECh. 13 - Prob. 33ECh. 13 - Prob. 34ECh. 13 - Prob. 35ECh. 13 - Prob. 36ECh. 13 - Prob. 37ECh. 13 - Prob. 38ECh. 13 - Prob. 39ECh. 13 - Prob. 40ECh. 13 - Prob. 41ECh. 13 - Prob. 42ECh. 13 - Prob. 43ECh. 13 - Prob. 44ECh. 13 - Prob. 45ECh. 13 - Prob. 46ECh. 13 - Prob. 47E
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