Mathematics, 01.12.2021 20:00, Giabear23

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. Required:
a. Calculate the value of the test statistic.
b. What is the conclusion based on the critical value approach?

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The sales of a grocery store had an average of $8,000 per day. The store introduced several advertis...