Question

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 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 this​population?

A.

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

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 skewed to one side.

D.

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

Answer 1

I think the correct one is C