A simple random sample of pulse rates of

30

women from a normally distributed population results in a standard deviation of

12.6

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 normalrange, 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 women have a standard deviation equal to 10 beats per minute. Complete parts(a) through(d) below.

Identify the null and alternative hypotheses. Choose the correct answer below.

A.

H0:=10

beats per minute

H1:10

beats per minute

B.

H0:=10

beats per minute

H1:<10

beats per minute

C.

H0:10

beats per minute

H1:<10

beats per minute

D.

H0:10

beats per minute

H1:=10

beats per minute

Part 2

b.Compute the test statistic.

2=___

(Round to three decimal places asneeded.)

Part 3

c.Find theP-value of the test statistic.

TheP-value of the test statistic is =___

(Round to three decimal places asneeded.)

Part 4

d.State the conclusion.

Reject? Or Fail to reject?

H0.

There

Is? Or 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.