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.

A) The correct null hypothesis for this problem is a.> 8200.

b.< 8000.

c. 8200.

d. = 8000.

B) The value of the test statistic is

a..133.

b.13.33.

c..013.

d.1.33.

C) The p-value is

a..1333.

b.1.3333.

c..0918.

d..9082.