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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 58 times)

mydiamond

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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


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Yixagurpuldink

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

D

Answer to Question 2

TRUE


mydiamond

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Reply 2 on: Jun 24, 2018
Gracias!

duy1981999

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Reply 3 on: Yesterday
Wow, this really help

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