The head librarian at the National Library of Australia has asked her assistant for an interval estimate of the mean number of books checked out each day.The assistant provides the following interval estimate: from 740 to 920 books per day.If the head librarian knows that the population standard deviation is 150 books checked out per day,approximately how large a sample did her assistant use to determine the interval estimate?
A) 3
B) 2
C) 12
D) It cannot be determined from the information given.

Question

Quizplus · Accepted Answer

The information provided includes the interval estimate and the population standard deviation, but it does not include the level of confidence or the exact formula used to calculate the interval estimate. Without this information, it's not possible to determine the sample size used.

The Head Librarian at the National Library of Australia Has