Grade 6 · Math · Lesson 26

Mean, Median, Mode and Range

A data set is just a list of numbers — test scores, heights, daily temperatures, the number of pets each kid in your class owns. Once you have a data set, four simple measures help you describe it: mean, median, mode, and range. Each one answers a different question about the data. Together they give you a quick portrait of what is typical, what is in the middle, what is most common, and how spread out the values are.

What this lesson teaches

1Calculate the mean of a data set by adding all values and dividing by the count
2Find the median by sorting the data and selecting the middle value
3Identify the mode as the value that appears most often
4Compute the range by subtracting the smallest value from the largest

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