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Page 1: 2   statistics -standard deviation may 20

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Deviation

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Using the data from the grade 10 test

12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17

Calculate the mean:  15.75

You need a chart 3 Columns

11 Rows

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x x ­ x x ­ x( )2

12144.516222011221917

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x x ­ x x ­ x( )2

12144.516222011221917

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Difference between each score, and the mean

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Determine the square of each of the differences

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Determine the sum of the squares

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Divide the sum of the squares by  n­1 

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The standard deviation is the square root of this number. 

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Standard Deviation Formula

Standard Deviation

** You don't have to remember this formula, just know how to calculate.**

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Assignment Page V-F-14

Questions: 1 - 6

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