We have the following information on the number of pull-ups eight new recruits can do at two time periods: the beginning and end of Basic Training.

	A	B	C	D	E	F	G	H
Beginning	17	14	7	12	13	5	16	13
End	21	15	6	14	15	6	17	16

We want to examine whether the mean numbers of pull-ups are different at the beginning and the end of the Basic Training.

(a) State the null and alternative hypotheses.

(b) Compute the test statistic and the P-value. If we perform the test at significance level = 0.1, what is your conclusion?