In a random sample of 651 computer scientists who subscribed to a web-based daily news update,it was found that the average salary was $46,816 with a standard deviation of $12,557.A 91% confidence interval for the mean salary of computer scientists would be _____.
A)[$25,469 $68,163]
B)[$46,592 $47,040]
C)[$46,157 $47,475]
D)[$46,783 $46,849]
E)[$45,979 $47,653]

Question

Quizplus · Accepted Answer

The 91% confidence interval is calculated using the sample mean, standard deviation, and sample size. The interval [$45,979 $47,653] is the correct range that captures the true mean salary with 91% confidence.

In a Random Sample of 651 Computer Scientists Who Subscribed