stats_cdf_normal

(PECL stats >= 1.0.0)

stats_cdf_normal — Calculates any one parameter of the normal distribution given values for the others

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stats_cdf_normal ( float $par1 , float $par2 , float $par3 , int $which ) : float

Returns the cumulative distribution function, its inverse, or one of its parameters, of the normal distribution. The kind of the return value and parameters (par1, par2, and par3) are determined by which.

The following table lists the return value and parameters by which. CDF, x, mu, and sigma denotes cumulative distribution function, the value of the random variable, the mean and the standard deviation of the normal distribution, respectively.

Return value and parameters
which Return value par1 par2 par3
1 CDF x mu sigma
2 x CDF mu sigma
3 mu x CDF sigma
4 sigma x CDF mu

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par1

The first parameter

par2

The second parameter

par3

The third parameter

which

The flag to determine what to be calculated

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Returns CDF, x, mu, or sigma, determined by which.