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 =