The range Start Thinking
What is the same and what is different about the heights of these two groups of children?
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The range tells us how spread out a data set is.
$400 000
$350 000
$450 000
$475 000
$375 000
On this street, the most expensive house is $475 000. The least expensive house is $350 000. The difference between the two is 475 000 − 350 000 The range is $125 000.
So the average is all about the middle of the data, and the range is about how spread out it is.
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