Chem 154 - 2012 Winter - handout 03 - NOTE(Three sigma rule For a Normal distribution almost all points lie within three standard deviations from the

Chem 154 - 2012 Winter - handout 03 - NOTE(Three sigma rule...

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NOTE: (Three sigma rule) ’For a Normal distribution, almost all points lie within three standard deviations from the average’ ( x - μ ) σ erf x - μ σ 2 1.0 0.68269 2.0 0.95450 3.0 0.99730 0 0.1 0.2 0.3 0.4 0.5 0.6 -4 -3 -2 -1 0 1 2 3 4 σ=1.0, µ=0.0 Gaussian P.D.F NOTE: The Normal Distribution can be generalised into higher dimensions: 2–19
QUESTION:Where does the Normal distribution play a rôle?

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