Bruce Tulgan, a consultant on generational workplace issues, estimates that 3.5 million people between the ages of 40 and 58 vanished from the American workforce from 2001 to 2004. That's about 5 percent of all baby-boomers. Tulgan writes, "Older white-collar workers are quickly becoming disenfranchised through no fault of their own. They have difficulty getting back into the job market, and when they do, their compensation is often significantly reduced." The disenfranchisement of baby boomers is an example of

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