Question

The College Board states that the average math SAT score is 514 with a standard deviation of 117. Colleen gathered data from 50 students in her graduating class and found the average score to be 529. She thinks that her class’s math SAT score is different from the average. Which of the following shows the correct z-statistic for this situation?

A. 0.38
B. 0.91
C. 1.26
D. 5.67

Answer 1

b is correct

Explanation:

Answer 2

z=(529-514)/(117/sqrt(50))=

(529-514)=15
117/sqrt=16.54629868

15/16.54629868=.9065471554
round=.91
answer is b
cheers