In a study of pulse rates of men, a simple random sample of 148 men results in a standard deviation of 11.5 beats per minute. The normal range of pulse rates of adults is typically given as

60 to 100 beats per minute. If the range rule of thumb is applied to that normal range, the result is a standard deviation of 10 beats per minute. Use the sample results with a 0.10 significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute; see the accompanying StatCrunch display for this test. What do the results indicate about the effectiveness of using the range rule of thumb with the "normal range" from 60 to 100 beats per minute for estimating in this case? Assume that the simple random sample is selected from a normally distributed population.

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Part 1

Let denote population standard deviation of the pulse rates of men (in beats per minute). Identify the null and alternative hypotheses.

H0: greater than> less than< not equals equals= enter your response here

H1: less than< greater than> not equals equals= enter your response here

Part 2

Identify the test statistic

Part 3

Find the P value

Part 4-

State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. (blank) the null hypothesis. There is or is not sufficient evidence to warrant rejection or support of the claim that pulse rates of women have a standard deviation equal to 10 beats per minute. The results indicate that there is or is not significant evidence that using the range rule of thumb with the "normal range" from 60 to 100 beats per minute for estimating is not or is effective in this case.