utomobile Association? Explain. 46. The 92 million Americans of age 50 and over control 50 percent of all discretionary income. AARP estimates that the average annual expenditure on restaurants and carryout food was $1873 for individuals in this age group. Suppose this estimate is based on a we lovesample of 80 persons and that the sample standard deviation is $550. a. At 95% confidence, what is the margin of error? as 101 2b. What is the 95% confidence interval for the population mean amount spent on fines for emrestaurants and carryout food? g housezab bish simsc. What is your estimate of the total amount spent by Americans of age 50 and over on restaurants and carryout food? d. If the amount spent on restaurants and carryout food is skewed to the right, would you expect the median amount spent to be greater or less than $1873