ppf()

atoti.stats.normal.ppf(
    point: VariableMeasureConvertible,
    /,
    *,
    mean: NumericMeasureConvertible,
    standard_deviation: StrictlyPositiveNumber | VariableMeasureConvertible,
) → MeasureDefinition

Percent point function for a normal distribution. Also called inverse cumulative distribution function. The ppf is given by the formula $$\operatorname {{ppf}}(x) = \mu + \sigma \sqrt{{2}} \operatorname {{erf}} ^{{-1}}(2x-1)$$ Where $\mu$ is the mean of the distribution, $\sigma$ is its standard deviation and $\operatorname {{erf}}^{{-1}}$ the inverse of the error function.

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Parameters

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point

The point where the function is evaluated.

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mean

The mean value of the distribution.

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standard_deviation

The standard deviation of the distribution. Must be positive.

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