Mathematics, 25.12.2019 02:31 welcome00

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 $6,300 per day. from past history, the restaurant knew that its population standard deviation is about $1,000. if the level of significance is 0.01, have sales increased as a result of the advertising campaign? multiple choice

a. reject the null hypothesis and conclude that the mean is equal to $6,000 per day.
b. fail to reject the null hypothesis.
c. reject the null hypothesis and conclude the mean is lower than $6,000 per day.
d. reject the null hypothesis and conclude the mean is higher than $6,000 per day.

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