A radio station claims that the amount of advertising each hour has a mean of 16 minutes and a standard deviation of 2.7 minutes. You listen to the radio station for 1 hour and observe that the amount of advertising time is 8 minutes. Calculate the z-score for this amount of advertising time.
A) z = -2.96
B) z = 2.96
C) z = -21.6
D) z = 0.33

Question

Quizplus · Accepted Answer

The z-score is calculated using the formula: z = (X - μ) / σ, where X is the observed value, μ is the mean, and σ is the standard deviation. Here, z = (8 - 16) / 2.7 = -2.96.

A Radio Station Claims That the Amount of Advertising Each