At a large department store, the average number of years of employment for a cashier is 5.7 with a standard deviation of 1.8 years.If an employee is picked at random, what is the probability that the
Employee has worked at the store for over 10 years?
A)49.16%
B)99.16%
C)0.84%
D)0.54%

Question

Quizplus · Accepted Answer

We can use the z-score formula to find the probability:
z = (10 - 5.7) / 1.8 = 2.39
Using a standard normal distribution table or calculator, we can find that the probability of z being greater than 2.39 is 0.0084, or 0.84%. Therefore, the answer is C.

At a Large Department Store, the Average Number of Years