Ch 14 Notes Part 2 of 2

Ch 14 Notes Part 2 of 2 - Range: Max Min Example: Find the...

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Range : Example: Find the range of the following numbers. Max: 15 RANGE = 15 – 3 = 12 Min: 3 8, 15, 13, 9, 7, 4, 3, 7, 14 Test Scores 98, 88, 73, 64, 82, 79, 67, 84, 12, 50, 66, 70, 77, 80, 85, 77 Range = Big Range! Max – Min 98 - 12 = 86
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Interquartile Range : Tells us the spread of the middle 50% of the data Not disturbed by outliers Test Scores 98, 88, 73, 64, 82, 79, 67, 84, 12, 50 66, 70, 77, 80, 85, 77 12 50 64 66 67 70 73 77 77 79 80 82 84 85 88 98 M = 77 Q 1 = 66.5 Q 3 = 83 Interquartile Range = 83 – 66.5 = 16.5 Q 3 – Q 1
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How far the data values are from the mean How spread out the data is If A is the average of a data set and x is a data point in the data set, then (x – A) is x’s deviation from the mean. Deviation from the mean: Data Point - Mean If the data point is smaller than the mean, its deviation will be negative. If the data point is larger than the mean, its deviation will be positive. If the data point equals the mean, its deviation will be zero.
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Ch 14 Notes Part 2 of 2 - Range: Max Min Example: Find the...

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