Z-values and raw scores
You need to calculate either the appropriate z-value or x-value for the following problems. Z-values should always to rounded to 2-decimal places. Z-values in general may be negative, positive, or zero and should mostly fall between -3 and 3.
The customer service center in a department store has determined that the amount of time spent with a customer about a complaint is normally distributed with a mean of 9.3 minutes and a standard deviation of 2.5 minutes.
4) What is the z-value that corresponds to x = 10 minutes?
z = __________
5) What is the z-value that corresponds to x = 5 minutes?
z = __________
6) What is the x-value that corresponds to z = 1.12? Round answer to the nearest whole number.
x = __________