DistributionValidations.php

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<?php
 
namespace PhpOffice\PhpSpreadsheet\Calculation\Statistical\Distributions;
 
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
use PhpOffice\PhpSpreadsheet\Calculation\Statistical\StatisticalValidations;
 
class DistributionValidations extends StatisticalValidations
{
    public static function validateProbability($probability): float
    {
        $probability = self::validateFloat($probability);
 
        if ($probability < 0.0 || $probability > 1.0) {
            throw new Exception(Functions::NAN());
        }
 
        return $probability;
    }
}