A normal population has a mean of 64 and a standard deviation of 13. You select a random sample of 9.?

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

(a) Greater than 66.

Probability:

(b) Less than 62.

Probability:

(c) Between 62 and 66.

Probability:
Update: (I am able to find the z values, but I am getting lost when it comes to the rest of the calculations.)
2 answers 2