Question

Data Set 1 in Appendix B includes 40 pulse rates of men, and those pulse rates have a mean of 67.3 beats per minute and a standard deviation of 10.3 beats per minute. That data set also includes 40 pulse rates of women, and those pulse rates have a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per minute.
a. Construct a 99% confidence interval estimate of the standard deviation of the pulse rates of men.
b. Construct a 99% confidence interval estimate of the standard deviation of the pulse rates of women.
c. Compare the variation of the pulse rates of men and women. Does there appear to be a difference?
Assume that each sample is a simple random sample obtained from a population with a normal distribution.


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  • CreatedMay 03, 2015
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