Acruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (the ship certainly doesn't want to run out of beer in the middle of the ocean! ) the average beer consumption over 1717 randomly selected seven-day cruises was 82 comma 35782,357 bottles with a sample standard deviation of 4 comma 4924,492 bottles. complete parts a and b below. a. construct a 95% confidence interval to estimate the average beer consumption per cruise. the 95% confidence interval to estimate the average beer consumption per cruise is from a lower limit of (blank) bottles to an upper limit of (blank) bottles.

(round to the nearest whole numbers.)

b. what assumptions need to be made about thispopulation?

a.

the only assumption needed is that the population size is larger than 30.

b.

the only assumption needed is that the population follows thestudent's t-distribution.

c.

the only assumption needed is that the population distribution is skewed to one side.

d.

the only assumption needed is that the population follows the normal probability distribution.