A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on futureseven-day cruises.(The ship certainlydoesn't want to run out of beer in the middle of theocean!) The average beer consumption over 12 randomly selectedseven-day cruises was 81,631 bottles with a sample standard deviation of 4,595 bottles. Complete parts a and b below.

a. Construct a 99% confidence interval to estimate the average beer consumption per cruise.

The 99% confidence interval to estimate the average beer consumption per cruise is from a lower limit of

nothing

bottles to an upper limit of

nothing

bottles.

(Round to the nearest wholenumbers.)

b. What assumptions need to be made about thispopulation?