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Author Question: If Z is a standard normal random variable, then P(1.25 (Read 55 times)

Mimi

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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

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Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

F


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Mimi

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Reply #2 on: Jul 24, 2018
Thank you!


beccamahon

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Reply #3 on: Jul 24, 2018
Always glad to help...


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