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 64 days of sales was selected. It was found that the average was $8300 per day. From past information, it is known that the standard deviation of the
population is $1200 . The p-value is
a. 2.000.
b. .9772.
c. .0228.
d. .5475.
c
Business
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