Author Question: Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1. If ... (Read 55 times)

misspop · **on:** Jul 25, 2018

Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1. If
P(-a < z < a) = 0.4314, find a.

A) -0.18 B) 0.3328 C) 0.57 D) 1.49

Question 2

In a certain college, 33 of the physics majors belong to ethnic minorities. If 10 students are
selected at random from the physics majors, that is the probability that no more than 6 belong to
an ethnic minority?

A) 0.982 B) 0.913 C) 0.055 D) 0.985