A Grocery Store Has an Average Sales of $8000 Per

Multiple Choice

A grocery store has an average sales of $8000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether or not the advertising campaigns have been effective in increasing sales, a sample of 100 days of sales was selected. It was found that the average was $8200 per day. From past information, it is known that the standard deviation of the population is $1500. The p-value is

A) 1.3333.
B) .9082.
C) .0918.
D) .1333.