Normal distribution

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[edit] Histograms

Some normal distributions with various parameters.

[edit] Normal probability plots

A normality probability plot - data falling around this straight indicates the degree of departure from normality. For more information, see * Q-Q plot

[edit] Symbols

1. Population mean = μ (Mu)
2. Population variance = σ² = (Sigma squared)

[edit] Descriptive indicators of normality

• Skewness
• Kurtosis

[edit] Inferential tests of normality

• Kolmogorov-Smirnov test
• Shapiro-Wilks test