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.What is an efficient,unbiased point estimate of the number of books checked out each day at the National Library of Australia?
A) 830
B) 1,660
C) 740
D) 920

Question

Quizplus · Accepted Answer

The efficient, unbiased point estimate is the midpoint of the interval estimate, which is (740 + 920) / 2 = 830 books per day.

The Head Librarian at the National Library of Australia Has