A simple random sample of

45

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

11.4

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 men 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.

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.

P-value=_____

(Round to four decimal places asneeded.)

Part 4

d. State the conclusion.

Rejct? Or Do not reject?

H0,

because theP-value is

less than? Or greater than?

the level of significance. There is

Sufficient? Or insufficient?

evidence to warrant rejection of the claim that the standard deviation ofmen's pulse rates is equal to

10

beats per minute.