Variance - Manual Calculation
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NameTime (seconds)
Deviation (= time - mean)
Squared deviation
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Jason2.350.200.04
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Taylor2.430.270.08
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Evelyn1.70-0.450.20
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Chase1.85-0.300.09
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Christian2.440.280.08
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Mean timeSum of squares
Population variance
Sample variance
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2.150.490.100.12
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