Sales at a Fast-Food Restaurant Average $6,000 Per Day

Multiple Choice

Sales at a fast-food restaurant average $6,000 per day. The restaurant decided to introduce an advertising campaign to increase daily sales. 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) 6,000
C) 6,400
D) 1.96