39. A study of 2000 teens found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 30 hours. The population standard deviation is 2 hours. What is the 95%
confidence interval for the mean? Evaluate and then complete the sentence. (Hint: Look at the variables given
to determine if you need equation 1 or 2 from above.) (4 pts)
The margin of error is
% meaning that we are 95% sure the actual mean is between
and
Do number 39