A cafe records its daily customer counts for eight days, already ordered: 12, 15, 15, 18, 20, 24, 25, 30. What is the median daily count?

1. There are n = 8 values, an even count, so the median averages the two middle values. 2. The middle positions are the 4th and 5th values in the ordered list: 18 and 20. 3. Average them: (18 + 20)/2 = 19 customers. 4. So the median daily count is 19 even though 19 never appears in the data. 5. Option B, 18, picks the lower middle value alone instead of averaging the two middle values. _Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.3 Measures of the Center of the Data_