The number of hours spent online by college students is claimed to be 22.5 hours per week with a standard deviation of 2.1 hours.
(a) Suppose we randomly select 50 college students, what is the probability that the mean number of hours online is greater than 25.
(b) Suppose I survey the 50 game programming students and the mean number of hours spent online is 25 hours per week. Is this unusual? Why or why not?