Hank is running for re-election as mayor. He wants to find out if he has a good chance of being elected, however, since there are 1.500 people in his town, he doesn't have time to ask each person in town who they are voting for. He decides to take a random sample instead. Which of the following strategies would help Hank ensure a random sample? OA. He could send an email to 30 city workers.
OB. He could ask 30 people as they enter church on Sunday.
Ос. He could go door to door and ask 30 various people in his neighborhood. OD. He could use a computer to pick 30 random addresses of people that live in the town.​

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)?