# Value of Z and Value of X based on Probability

1. For some positive value of Z, the probability that a standard normal variable is between 0 and Z is 0.3770. The value of Z is

a) 0.18

b) 0.81

c) 1.16

d) 1.47

2. For some positive value of X, the probability that a standard normal variable is between 0 and +2X is 0.1255. The value of X is

a) 0.99

b) 0.40

c) 0.32

d) 0.16

don't use excel please. i need formula explanation. Thanks.

#### Solution Summary

Statistics MCQ: This posting contains 2 statistics multiple choice questions.