Albert Abbasi, VP of Operations at Ingleside International Bank, is evaluating the service level provided to walk-in customers.Accordingly, he plans a sample of waiting times for walk-in customers.If the population of waiting times has a mean of 15 minutes and a standard deviation of 4 minutes, the probability that Albert's sample of 64 will have a mean less than 15 minutes is ________.
A)0.5000
B)0.0228
C)0.9072
D)0.9544
E)1.0000

Question

Quizplus · Accepted Answer

Given the symmetry of the normal distribution, the probability that the sample mean is less than the population mean (15 minutes) is 0.5000, as the distribution of sample means is centered around the population mean.

Albert Abbasi, VP of Operations at Ingleside International Bank, Is