The number of customers who visited a store each hour for a Saturday afternoon was recorded as follows: 25, 32, 18, 40, 28, 32, 21. What is the median number of customers?

✓ Correct Answer: Option A

First, order the data: 18, 21, 25, 28, 32, 32, 40. The median is the middle value in an ordered set. With 7 data points, the 4th value (28) is the median.