Question

Suppose that, based on a sample, the 99.7% confidence interval for the mean of a population is (59, 95). What was the mean of the sample?

A. 84
B. 77
C. 69
D. 73

Answer 1

The mean of the sample is midway between 59 and 95.

Answer 2

The required mean is simply:
\[\large \frac{59+95}{2}=you\ can\ calculate\]

Answer 3

B. 77

Answer 4

kropot is correct :)