Foot cream mini case: athlete's aid is a foot cream designed to prevent athlete's foot with once- daily application after showering. athlete's aid advertising features tom brown, a well known football player, giving a testimonial on how effectively athlete's aid prevents athlete’s foot and the terrible foot smell associated with it. these television ads are placed at the end of the advertising series immediately before kick-off in a number of important games during the football season, with the ad repeated during the rest of the game. in the foot cream mini case, athlete's aid's placement of advertisements at the end of an advertising series is an attempt to take advantage 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