Evaluate:

-7 - (-8) + (-3) + 6 - 2

A) -2
B) 0
C) 1
D) 2

Nielsen media research wants to estimate the mean amount of time (in minutes) that full- time college students spend watching television each weekday. find the sample size necessary to estimate the mean with a 15-minute margin of error. assume that a 95% confidence level is desired. also assume that the population standard deviation is known to be 112.2 minutes.