Sales at a fast-food restaurant average $6,000 per day. the restaurant decided to introduce an advertising campaign to increase daily sales. in order to determine the effectiveness of the advertising campaign a sample of 49 days of sales were taken. they found that the average daily sales were $6,400 per day. from past history, the restaurant knew that its population standard deviation is about $1,000. the value of the test statistic is
a. 2.8 b. 1.96 c. 6,400 d. 6,000
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Sales at a fast-food restaurant average $6,000 per day. the restaurant decided to introduce an adver...
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