a. 0.8849 b. 0.9616 c. 0.0596 d. 0.0384 QUESTIONS #45-#46 REFER TO THE FOLLOWING: 45. To determine the mean cost of groceries in a certain city, an identical grocery basket of food is f the average cost is $47.52 with a purchased at each store in a random sa standard deviation of $1.59, find a 98% confidence interval estimate for the cost of these groceries in the city. mple of ten stores. 1 a. $47.52 $0.45 b. $47.52+ $1.42 C. $47.52 $1.39 d. $47.52+$1.17 Suppose that a 98% confidence interval for is (Sx, Sy). Choose a correct interpretation of this confidence interval by selecting one of the statements below. 46. There is a 98% probability that the average cost of groceries in a certain city is between Sx and Sy There is a 98% probability that a randomly selected grocery basket costs between$x and a. b. Sy. we are 98% confident that the average cost of groceries in our sample isbetweenSx and c, sy are 95% we are 98% confident that the average cost of groceries in a certain city is betweens and Sy d