Look at the data set below.{9, 12, 12, 15, 18, 20, 25}In this data set, what is the median?

The data are already arranged from least to greatest, and there are 7 values. With an odd number of values, the median is the one in the middle: the 4th value. Counting to the 4th value gives 15, so the median is 15 (choice C).

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