how do you get the right answer?

2. A cruise company would like to estimate the average beer consumption to plan its beer inventory stion 2, 8.3 levels on future seven-day cruises. (The ship certainly doesn't want to run out of beer in the middle of Part 1 of 2 the ocean!) The average beer consumption over 11 randomly selected seven-day cruises was 81,946 bottles with a sample standard deviation of 4,539 bottles. Complete parts a and b below. consumption to a. Construct an 80% confidence interval to estimate the average beer consumption per cruise. eer consumption The 80% confidence interval to estimate the average beer consumption per cruise is from a lower limit of bottles to an upper limit of bottles. erage beer cons (Round to the nearest whole numbers.) consumption per b. What assumptions need to be made about this population? O A. The only assumption needed is that the population follows the normal probability distribution. O B. The only assumption needed is that the population follows the Student's t-distribution. O C. The only assumption needed is that the population size is larger than 30. O D. The only assumption needed is that the population distribution is skewed to one side