3. A law student, who wants to check a professors' claim that convicted embezzlers spend on the average 12.8 months in jail, takes a random sample of 60 such cases from court files. Using this results, x = 11.2 months and SD = 3.5 months, test the null hypothesis Me = 12.8 months against the alternative hypothesis, Me #12.8 months at 0.01 level of significance