Difficult# Music Store

APSTAT-DVTRTA

A music store owner was curious about the number of customers his store gets per day.

He samples the next $25\text{ days}$ and finds an average of $65.5$ customers with a standard deviation of $11.3$ customers.

Assuming these $25\text{ days}$ represent a random sample of all days, a $95\%$ confidence interval for this data would be