In a Random Sample of 651 Computer Scientists Who Subscribed

Multiple Choice

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 population standard deviation of $12,557. Calculate a 91 percent confidence interval for the mean salary of computer scientists.

A) [$25,469, $68,163]
B) [$46,592, $47,040]
C) [$46,157, $47,475]
D) [$46,783, $46,849]
E) [$45,981, $47,650]