Question

This Test: 46 pts possible 4 30 of 46 (0 complete) This Question: 1 pt A radio station claims that the amount of advertising per hour of broadcast time has an average of 17 minutes and a standard deviation equal to 1.1 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 15 minutes Calculate the z score for this amount of advertising time O A. z-182 OB. z#-1.82 O C. z 082 OD, z=-0.82 Click to select your answer

Answer 1

Given :-

z score is calculated by taking (X - E(X))/Std(X) where,
X = observed value = 15
E(X) = the average value = 17
Std(X) = the standard deviation of X = 1.1

Therefore,

z = ( 15 - 17 ) / 1.1

z = -1.82

# Answer : option "B" is correct.