The manager of an aquatic center is interested in the average number of fish people keep in their saltwater tanks.
She randomly selects 38 people who own saltwater fish tanks and asks how many fish they have. The mean
number of fish is 48.2 with a standard deviation of 22.1 fish. Which of the following is the 99% confidence interval
for the true mean number of fish in saltwater tanks?
Find the t-table here.
A. (38.47, 57.94)
B. (40.94, 55.64)
C. (42.15, 54.25)
D. (42.93, 53.47)