A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard deviation
equal to 1.2 minutes. You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of
advertising time is equal to 8 minutes. Calculate the z-score for this amount of advertising time.
A. z = -0.52
B. z = -4.17
C. O z = 4.17
D. z = 0.52