8.The main trial in problem 7 is conducted and involves a total of 200 patients.Patients are enrolled and randomized to receive either the experimental medication or the placebo.The data shown in the table 7-55 are collected at the end of the study after 6 weeks on the assigned treatments.

a. Test if there is a significant difference in means systolic blood pressures between groups using a=0.05

b. Test if there is significant difference in the proportions of hypertensive patients between groups using a=0.05Please show your work

?

\f