A telephone company has found that the lengths of its long distance telephone calls are normally distributed, with a mean of 225 s and a standard deviation of 55 s. a. What is the Zscore if the number...

A telephone company has found that the lengths of its long distance telephone calls are normally distributed, with a mean of 225 s and a standard deviation of 55 s.

a. What is the Zscore if the number of minutes is 340 s?

b. What is the Zscore if the number of long distance call is 200 s ?