Abinomial event has n = 30 trials. the probability of success for each trial is 0.30. let x be the number of successes of the event during the 30 trials. what are μx and σx?
μx = 2.51 and σx = 9
μx = 21 and σx = 6.3
μx = 9 and σx = 2.51
μx = 6.3 and σx = 21

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)?