Question

Suppose that, based on a sample, the 95% confidence interval for the mean of a population is (25, 41). What was the mean of the sample?

A.
31
B.
37
C.
33
D.
35

Answer 1

C. 33

Explanation:

Sample mean is right in the centre of the interval

Sample mean:

(25+41)/2

66/2

33