The Number of Hours Per Week That High School Seniors

Multiple Choice

The number of hours per week that high school seniors spend on computers is normally distributed, with a mean of 4 hours and a standard deviation of 2 hours.60 students are chosen at random.Let represent the mean number of hours spent on the computer for this group.Find the probability that is between 4.2 and 4.4.

A) 0.041
B) 0.159
C) 0.317
D) 0.720
E) 0.775