If the researchers conduct a study to examine whether mean systolic blood pressure is different between oral contraceptive users and non-users and had obtained the following results: tdiff=2.187, df=29, p=0.037 what would they correctly conclude (alpha=0.05)?

a.

Accept null hypothesis, the mean systolic blood pressure for oral contraceptive users is not different than the mean systolic blood pressure for non-users

b.

Fail to reject null hypothesis, the mean systolic blood pressure for oral contraceptive users is different than the mean systolic blood pressure for non-users

c.

Reject null hypothesis; the mean systolic blood pressure for oral contraceptive users is different than the mean systolic blood pressure for non-users

d.

Reject null hypothesis; the proportion of systolic blood pressure for oral contraceptive users is different than the proportion of systolic blood pressure for non-users