Concept explainers
To identify: The test used to compare the blood pressures of two groups.
Answer to Problem 28.32CYS
Correct answer:
Option (a), Wilcoxon rank sum test.
Explanation of Solution
Reason for the correct answer:
Here, the blood pressure of eight high-capacity and eight low-capacity rats are compared. That is, the two samples are independent and they are compared. Hence, the Wilcoxon rank sum test is used.
Reason for the incorrect answer:
Option (b) and Option (c) are incorrect because the two independent samples are involved in the study. Hence, the Wilcoxon rank sum test is used
Conclusion:
Therefore, the correct option is (a).
Introduction:
The alternative method for the unpaired t-test is Wilcoxon rank sum test. The Wilcoxon rank sum test is also called the Mann-Whitney U test or the Wilcoxon-Mann-Whitney test.
The conditions required for this test are mentioned below:-
- Two samples are independent and simple random sample from the two distinct populations.
- Both the populations are continuous distribution.
- The two populations have the distribution of the same shape.
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Chapter 28 Solutions
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