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 15 randomly selected seven-day cruises was 81,551 bottles with a sample standard deviation of 4,572 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 lower limit of _____bottles to an upper limit of ___ bottles (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 follows the Student's t-distribution
C. The only assumption needed is that the population distribution is showed to one side
D. The only assumption needed is that the population size is larger than 30.
