Exhibit 9-9 the Sales of a Grocery Store Had an Average of Average

Multiple Choice

Exhibit 9-9
The sales of a grocery store had an average of $8,000 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 64 days of sales was selected. It was found that the average was $8,300 per day. From past information, it is known that the standard deviation of the population is $1,200.
-Refer to Exhibit 9-9. The value of the test statistic is

A) 250
B) 8000
C) 8250
D) 2.0