peter plans to build a tree house in his back yard. he needs to know how many square feet of lumber he should buy for the floor. he considers the greatest number of people who will be in the tree house at one time, and decides to allow 20 square feet of floor space per person.
which expression can peter use to determine the size of the floor, in square feet, if n represents the number of people?
20n
20 + n
20 – n
20/n

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)?