A normal population has a mean of 60 and a standard deviation of 12. You select a random sample of 9. Compute the probability the sample mean is: (Round z values to 2 decimal places and final answers...

A normal population has a mean of 60 and a standard deviation of 12. You select a random sample of 9.

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

1. 
   

   Greater than 63.

   
   


2. less than 56


3. between 63 and 56