Question

question 8 of 10
suppose that, based on a sample, the 95% confidence interval for the mean of a population is (61, 85). what was the mean of the sample?
a. 81
b. 77
c. 73
d. 69

Explanation:

Step1: Find midpoint of interval

The sample mean is the midpoint of the confidence interval. Calculate as $\frac{61 + 85}{2}$.

Step2: Compute the value

$\frac{146}{2} = 73$

Answer:

C. 73