c2t3 - Sums = 115 0.0 160.00 Mean = 115/25 = 4.6 Variance =...

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Observation Number Computer Sales ( X ) (Xi - mean of X) (Xi - mean of X)^2 1 3 -1.6 2.56 2 4 -0.6 0.36 3 5 0.4 0.16 4 1 -3.6 12.96 5 5 0.4 0.16 6 3 -1.6 2.56 7 6 1.4 1.96 8 2 -2.6 6.76 9 7 2.4 5.76 10 8 3.4 11.56 11 1 -3.6 12.96 12 13 8.4 70.56 13 4 -0.6 0.36 14 4 -0.6 0.36 15 7 2.4 5.76 16 3 -1.6 2.56 17 4 -0.6 0.36 18 2 -2.6 6.76 19 5 0.4 0.16 20 7 2.4 5.76 21 4 -0.6 0.36 22 5 0.4 0.16 23 2 -2.6 6.76 24 6 1.4 1.96 25 4 -0.6 0.36
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Unformatted text preview: Sums = 115 0.0 160.00 Mean = 115/25 = 4.6 Variance = 160 / (25-1) = 6.67 Stanard Deviation = Square Root of Variance = 2.58 Chapter 2 Table 2-3 Calculation of the Standard Deviation and Variance for the Computer Sales Data (Assuming a Sample)...
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This note was uploaded on 11/11/2009 for the course FTS 4905 taught by Professor Stanuryasev during the Spring '09 term at University of Florida.

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c2t3 - Sums = 115 0.0 160.00 Mean = 115/25 = 4.6 Variance =...

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