A sample mean is compared against a standard for a large sample. Now, assume the sample mean was found to equal 40. What is the appropriate confidence interval? (Note: Round to the nearest whole number.)
A) 23

Question

A sample mean is compared against a standard for a large sample. Now, assume the sample mean was found to equal 40. What is the appropriate confidence interval? (Note: Round to the nearest whole number.)
A) 23 < μ < 57
B) Can't be determined from the information given.
C) 14 < μ < 66
D) 38 < μ < 42
E) 20 < μ < 60

Quizplus · Accepted Answer

The confidence interval cannot be determined without additional information such as the standard deviation and the confidence level.

A Sample Mean Is Compared Against a Standard for a Large