Posted: July 18th, 2021

A normal population has a mean of 75 and a standard deviation of 5.

A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40.

 

Compute the probability the sample mean is: (Round z values to 2 decimal places and final answers to 4 decimal places):

 

a.         Less than 74.

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  Probability =            

 

b.         Between 74 and 76.

 

  Probability =            

 

c.         Between 76 and 77.

 

  Probability =

 

d.         Greater than 77.

 

  Probability =

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