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How do you find the range of something?

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February 28, 2012 10:57PM

Problem:Cheryl took 7 math tests in one marking period. What is the range of her test scores?89, 73, 84, 91, 87, 77, 94Solution:Ordering the test scores from least to greatest, we get:73, 77, 84, 87, 89, 91, 94highest - lowest = 94 - 73 = 21Answer:The range of these test scores is 21 points.Definition:The range of a set of data is the difference between the highest and lowest values in the set.