Listed below are the lead concentrations in g/g measured in different traditional medicines. Use a 0.01 significance level to test the claim that the mean lead concentration for all such medicines is less than 15 g/g. Assume that the sample is a simple random sample.

21

16.5

8.5

3

7.5

16

7.5

16.5

9.5

11

Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses?

A.

H0:

=15

g/g

H1:

15

g/g

B.

H0:

=15

g/g

H1:

>15

g/g

C.

H0:

=15

g/g

H1:

<15

g/g

D.

H0:

>15

g/g

H1:

<15

g/g

Determine the test statistic.

enter your response here

(Round to two decimal places as needed.)

Determine the P-value.

enter your response here

(Round to three decimal places as needed.)

State the final conclusion that addresses the original claim.

Fail to reject

Reject

H0.

There is

not sufficient

sufficient

evidence to conclude that the mean lead concentration for all such medicines is

less than

equal to

greater than

not

15

g/g.