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.
 
  Probability =            
 
b.         Between 74 and 76.
 
  Probability =            
 
c.         Between 76 and 77.
 
  Probability =
 
d.         Greater than 77.
 
  Probability =

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