The manager of the All-Night Corporation recently conducted a survey of 196 of its employees to determine the average number of hours that each employee sleeps at night. The company statistician submitted the following information to the management:
E(x)x=1479.8 and E(x-x bar)^2=1755
Where x is the number of hours slept by each employee. Find a 95% confidence interval estimate for the average number of hours each employee sleeps at night. Be sure to include critical values