Question

In order to estimate the average electricity usage per month, a sample of 15 houses was selected, and the electricity usage was determined. Assume a population variance of 10,000kWh2. Find the 98% confidence interval for the mean electricity usage in kilowatt hours. Round your answers to the nearest integer and use ascending order. Electric Usage

1240, 750, 955, 668 ,841, 1203 ,631, 850 ,711, 1083, 953 ,891 ,1030, 804 ,1120

(_,_)

Answer 1