Rochelle wants to determine the favorite food among her family members at a reunion. Which sampling method would most likely provide a representative sample of the family members?

A. Divide the female family members at the reunion into age groups of equal size, and survey four female family members chosen randomly from each age group.

B. Divide all the family members at the reunion into age groups of equal size, and survey three family members were chosen randomly from each age group.

C. Survey all the family members at the reunion who are under 10 years old.

D. Survey all the family members at the reunion who are over 60 years old.

Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?