AP Stats Questions Pls Help!

Question

Question 1:

A new anxiety medication has been manufactured and a study is being conducted to determine whether its effectiveness depends on dose. When 40 milligrams of the medication was administered to a simple random sample (SRS) of 60 patients, 21 of them demonstrated lower stress levels. When 75 milligrams of the medication was administrated to another SRS of 85 patients, 34 of them demonstrated lower stress levels. Which of the following test statistics is an appropriate hypothesis test? (4 points)

A	C
B
C
D
E

Question 2:

At a large university, 20% of a random sample of male students have an overall grade point average (GPA) of 3.5 or higher. A random sample of female student records found that 25% had a GPA of 3.5 or higher. The president of the university wants to determine whether there is evidence of a difference in grades between males and females. What would she write as the null and alternative hypotheses for this situation? (4 points)

A	H0:p1 − p2 = 0 and Ha:p1 − p2 ≠ 0
B	H0:p1 − p2 = 0 and Ha:p1 − p2 > 0
C	H0:p1 − p2 = 0 and Ha:p1 − p2 < 0
D	H0:p1 − p2 > 0 and Ha:p1 − p2 = 0
E	H0:p1 − p2 > 0 and Ha:p1 − p2 ≠ 0

Answer 1

Question 1: C

Question 2: A