Given an Infinite Population with a Mean of 75 and a Standard

Multiple Choice

Given an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations, taken at random from this population, exceeds 78 is:

A) 0.4332 .
B) 0.0668 .
C) 0.0987
D) 0.9013 .