Thirty-nine home sizes are listed in increasing order. Using the index formula i = (k/100)(n + 1) for the 25th percentile, which value in the list is the first quartile?

1. The first quartile is the 25th percentile, so use k = 25 and n = 39 in the index formula. 2. Compute the index: i = (25/100)(39 + 1) = 0.25 x 40 = 10. 3. The index is a whole number, so no averaging is needed. 4. The first quartile is exactly the 10th value in the ordered list. 5. Option D applies the rounding-and-averaging rule, which is only used when the index is not an integer. _Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.2 Measures of the Location of the Data_