I’m studying for my Probability class and don’t understand how to answer this. Can you help me study?

## Problem 1

Suppose a simple random sample of 150 students is drawn from a population of 3000 college students. Among sampled students, the average IQ score is 115 with a standard deviation of 10. What is the 99% confidence interval for the students’ IQ score?

(A) 115 __+__ 0.01

(B) 115 __+__ 0.82

(C) 115 __+__ 2.1

(D) 115 __+__ 2.6

(E) None of the above