In an imaginary economy, consumers buy only hot dogs and hamburgers. the fixed basket consists of 10 hot dogs and 6 hamburgers. a hot dog cost $3 in 2006 and $5.40 in 2007. a hamburger cost $5 in 2006 and $6 in 2007. which of the following statements is correct? a. when 2007 is chosen as the base year, the consumer price index is 100 in 2006. b. when 2007 is chosen as the base year, the inflation rate is 50 percent in 2007. c. when 2006 is chosen as the base year, the inflation rate is 150 percent in 2007. d. when 2006 is chosen as the base year, the consumer price index is 90 in 2007.

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