Finding Confidence Intervals. In Exercises 916, assume
Chapter 7, Problem 12(choose chapter or problem)
Finding Confidence Intervals. In Exercises 916, assume that each sample is a simplerandom sample obtained from a population with a normal distribution. Pulse Rates of Men and Women Data Set 1 in Appendix B includes 40 pulse rates ofmen, and those pulse rates have a mean of 67.3 beats per minute and a standard deviationof 10.3 beats per minute. That data set also includes 40 pulse rates of women, and thosepulse rates have a mean of 77.5 beats per minute and a standard deviation of 11.6 beatsper minute.a. Construct a 99% confidence interval estimate of the standard deviation of the pulse ratesof men.b. Construct a 99% confidence interval estimate of the standard deviation of the pulse ratesof women.c. Compare the variation of the pulse rates of men and women. Does there appear to bea difference?
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