My substantive hypothesis is that male students are on the average older than female students.

The average age of the men in my survey is 22.2 years of age and the average age of the women is 19.4 years of age.

a) what is my null hypothesis?

b) do I accept the null hypothesis or the substantive hypothesis if my p value = .07 and my criterion level of significance = .10. Defend your answer.