Question

A simple random sample of 45 men from a normally distributed population results in a standard deviation of 11.6 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 0.05 significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute. b. Compute the test statistic. (Round to three decimal places as needed.)

          A simple random sample of 45 men from a normally distributed
population results in a standard deviation of 11.6 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 0.05
significance level to test the claim that pulse rates of men have a
standard deviation equal to 10 beats per minute. b. Compute the
test statistic. (Round to three decimal places as needed.)

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Added by Francisco Javier P.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

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Solved by Expert Ahmet Yavas

05/23/2023

Step 1

Null hypothesis: The standard deviation of pulse rates of men is equal to 10 beats per minute. Alternative hypothesis: The standard deviation of pulse rates of men is not equal to 10 beats per minute. Show more…

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A simple random sample of 45 men from a normally distributed population results in a standard deviation of 11.6 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 0.05 significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute. b. Compute the test statistic. (Round to three decimal places as needed.)

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