The tread depth of the right front tire was measured for 10

The tread depth of the right front tire was measured for 10 randomly stopped automobiles. The mean was 0.32 inch, and the standard deviation was 0.08 inch. Find the 99% confidence interval of the mean depth. Assume that the variable is approximately normally distributed.

0.238 ?

Solution

a)
Confidence Interval
CI = x