g Using teasers in digital media as a way to pull readers or listeners into a story or other document A) is unethical and should always be avoided. B) is appropriate only when large purchases are not involved. C) is effective, as long as the payoff is valuable and legitimate. D) is never appropriate for microblogging sites. E) was once effective, but is not any longer due to an internet-savvy public.

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