Data consistent with summary quantities in the article referenced in Exercise 9.3 on total calorie consumption on a particular day are given for a sample of children who did not eat fast food on that day and for a sample of children who did eat fast food on that day.

Assume that it is reasonable to regard these samples as representative of the population of children in the United States.

No Fast Food 2331 1918 1009 1730 1469 2053 2143 1981 1852 1777 1765 1827 1648 1506 2669 Fast Food 2523 1758 934 2328 2434 2267 2526 1195 890 1511 875 2207 1811 1250 2117

a. Use the given information to estimate the mean calorie intake for children in the United States on a day when no fast food is consumed.

b. Use the given information to estimate the mean calorie intake for children in the United States on a day when fast food is consumed.

c. Use the given information to produce estimates of the standard deviations of calorie intake for days when no fast food is consumed and for days when fast food is consumed.