Using Pearson Best-Fit Criteria

Quality uses Pearson criteria to determine the best-fit distribution for the sample. A K value, computed using the following equation, classifies the distribution as one of the following types:

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Pearson Frequency Curves

The following table describes Pearson frequency curves.

Type Description Criteria

1

Beta

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2

Uniform

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3

Gamma

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4

Non Central t

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5

Inverse Gamma

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6

Inverse Beta

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7

Student t

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8

Normal

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10

Exponential

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