Suppose a variable is approximately normally distributed with mean 12 and standard deviation 5. What is the Z-score of x= 4?
A) 1.6
B) 0
C)- 1.6
D) -0.083

Write a real-world word problem that can be solved by adding 34.99 and 5.79. then solve

The head librarian at the library of congress 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 library of congress?

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?