Question

Suppose that, based on a sample, the 68% confidence interval for the mean of a population is (63,75). What was the mean of the sample?

A) 73
B) 77
C) 81
D) 69

Answer 1

can u guys just tell me what was wrong with my answer??????

the answer is d which is 69

Explanation:

Answer 2

The answer is D.

Using the formula of Mean, x¯=
`(∑x)/(N)`
∑ is the summation
x is the score
N is the number of scores

Therefore, Mean = ∑(63+75) / 2
Mean = 138 / 2
Mean = 69