Author Question: If Z is a standard normal random variable, then P(-1.25 Z -0.75 ) is: A) 0.6678 B) 0.1056 C) ... (Read 50 times)

mydiamond · **on:** Jun 24, 2018

If Z is a standard normal random variable, then P(-1.25 Z -0.75 ) is:

A) 0.6678
B) 0.1056
C) 0.2266
D) 0.1210

Question 2

In testing for the differences between the means of two independent populations, we assume that the 2 populations each follow a normal distribution.

Indicate whether the statement is true or false