The mean of a normally distributed group of weekly incomes of a large group of executives is $1,000 and the standard deviation is $100. What is the z-score for an income of $1,100?
A) 1.00
B) 2.00
C) 1.683
D) -0.90
E) None of the choices are correct

Question

Quizplus · Accepted Answer

The z-score is calculated by subtracting the mean from the income and then dividing by the standard deviation: (1100 - 1000) / 100 = 1.00.

The Mean of a Normally Distributed Group of Weekly Incomes