Suppose that a sample of customers per hour were randomly taken from a store and that the

Question:

Suppose that a sample of customers per hour were randomly taken from a store and that the sample standard deviation of the number of customers per hour was 2.4 are based on this information. Assume that the number of customers per hour is normally distributed.
Would a 99% confidence interval with a sample size of 15 be wider or narrower than the one in Question 9?