If Z is a standard normal random variable, then P(1.25

Author Question: If Z is a standard normal random variable, then P(1.25 (Read 78 times)

Mimi

Hero Member
Posts: 542

on: Jul 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
e. 0.3482

Question 2

In estimating the difference between two population means, if a 90 confidence interval includes zero, then we can be 90 certain that the difference between the two population means is zero.
Indicate whether the statement is true or false

beccamahon

Sr. Member
Posts: 338

Reply #1 on: Jul 24, 2018

Answer to Question 1

D

Answer to Question 2

F

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Mimi

Hero Member
Posts: 542

Reply #2 on: Jul 24, 2018

Thank you!

beccamahon

Sr. Member
Posts: 338

Reply #3 on: Jul 24, 2018

Always glad to help...

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Author Question: If Z is a standard normal random variable, then P(1.25 (Read 78 times)

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