A 92 confidence interval for a mean has a confidence interva

A 92% confidence interval for a mean has a confidence interval (52, 62).

What is the sample mean?
A. Cannot be determined B. 57 C. 60 D. 2

What is the margin of error for this interval? A. 2 B. 57 C. 92 D. 5

Solution

Mean - marginal error = 52------------>1

Mean + marginal error = 62------------>2

1+2 ,

2* Mean = 114

=> Mean = 57 Option B

Margin of error = 57-52 = 5 Option D