A cruise 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 randomly selected seven-day cruises was bottles with a sample standard deviation of bottles. Complete parts a and b below. 22 81,935 4,541 a. Construct % confidence interval to estimate the average beer consumption per cruise. a 90 The % confidence interval to estimate the average beer consumption per cruise is from a lower limit of bottles to an upper limit of bottles. 90 (Round to the nearest whole numbers.) b. What assumptions need to be made about this population? A. The only assumption needed is that the population follows the normal probability distribution. B. The only assumption needed is that the population size is larger than 30. C. The only assumption needed is that the population follows the Student's t-distribution. D. The only assumption needed is that the population distribution is skewed to one side.