Question

A simple random sample of pulse rates of 60 women from a normally distributed population results in a standard deviation of 11.9 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 women have a standard deviation equal to 10 beats per minute. Complete parts (a) through (d) below. a. Identify the null and alternative hypotheses. Choose the correct answer below. A. Upper H0 : sigma equals 10 beats per minute Upper H1 : sigma less than 10 beats per minute B. Upper H0: sigma greater than or equals 10 beats per minute Upper H1: sigma less than 10 beats per minute C. Upper H0 : sigma equals 10 beats per minute Upper H1: sigma does not equal 10 beats per minute D. Upper H0 : sigma does not equal 10 beats per minute Upper H1 : sigma equals 10 beats per minute b. Compute the test statistic. chi-squared equals nothing (Round to three decimal places as needed.) c. Find the P-value of the test statistic. The P-value of the test statistic is nothing. (Round to three decimal places as needed.) d. State the conclusion. ▼ Reject Fail to reject Upper H 0. There ▼ is not sufficient evidence to warrant rejection of the claim that pulse rates of women have a standard deviation equal to 10 beats per minute.

Answer #1

C. H0 : sigma equals 10 beats per minute

H1: sigma does not equal 10 beats per minute

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