Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305445963
Author: PECK
Publisher: Cengage
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Chapter 16.2, Problem 15E
To determine
Test whether the
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The Lion’sMane. In a study by P. M.West titled “The Lion’s Mane” (American Scientist, Vol. 93, No. 3, pp. 226–236), the effects of the mane of a male lion as a signal of quality to mates and rivals was explored. Four life-sized dummies of male lions provided a tool for testing female response to the unfamiliar lions whose manes varied by length (long or short) and color (blonde or dark). The female lions were observed to see whether they approached each of the four life-sized dummies.
a. experimental units.
b. response variable.
c. factor(s).
d. levels of each factor.
e. treatments.
Suppose a study investigated the effects of vitamin A, vitamin C, and omega-3 fatty
acids supplements on improving eye health and vision. 300 adults volunteered to take
part in the study. In the study, participants were randomly assigned to one of 3
different levels of Vitamin A (Level A, Level B, or Level C) and randomly assigned to one
of 2 different levels of Vitamin C (Level 1 or Level 2) and randomly assigned to one of 2
different levels of omega-3 fatty acid (Level I or Level II).
a. Identify the subjects of the study.
b. Identify the factor(s) for the study and the number of treatment level(s) for each
factor.
c. How many different treatment groups are there in this study?
The article "Effect of Refrigeration on the Potassium Bitartrate Stability and Composition
of Italian Wines" (A. Versari, D. Barbanti, et al., Italian Journal of Food Science, 2002:45-
52) reports a study in which eight types of white wine had their tartaric acid concentration
(in g/L) measured both before and after a cold stabilization process. The results are
presented in the following table:
Wine Type
Before
After
Difference
2.86
2.59
0.27
2.85
2.47
0.38
3
1.84
1.58
0.26
4
1.60
1.56
0.04
0.80
0.78
0.02
6.
0.89
0.66
0.23
2.03
1.87
0.16
1.90
1.71
0.19
Find a 95% confidence interval for the mean difference between the tartaric acid
concentrations before and after the cold stabilization process.
Chapter 16 Solutions
Introduction to Statistics and Data Analysis
Ch. 16.1 - Urinary fluoride concentration (in parts per...Ch. 16.1 - Prob. 2ECh. 16.1 - Prob. 3ECh. 16.1 - A blood lead level of 70 mg/ml has been commonly...Ch. 16.1 - The effectiveness of antidepressants in treating...Ch. 16.1 - Prob. 6ECh. 16.1 - Prob. 7ECh. 16.2 - The effect of a restricted diet in the treatment...Ch. 16.2 - Peak force (N) on the hand was measured just prior...Ch. 16.2 - In an experiment to study the way in which...
Ch. 16.2 - Prob. 11ECh. 16.2 - Prob. 12ECh. 16.2 - Prob. 13ECh. 16.2 - Prob. 14ECh. 16.2 - Prob. 15ECh. 16.2 - Prob. 16ECh. 16.2 - Prob. 17ECh. 16.2 - The signed-rank test can be adapted for use in...Ch. 16.3 - Prob. 19ECh. 16.3 - Prob. 20ECh. 16.3 - The given data on phosphorus concentration in...Ch. 16.3 - Prob. 22ECh. 16.3 - Prob. 23ECh. 16.3 - The following data on amount of food consumed (g)...Ch. 16.3 - The article Effect of Storage Temperature on the...
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