PHP Класс MathPHP\Probability\Distribution\Table\ChiSquared
Use degrees of freedom and desired P value to find χ² value.
https://en.wikipedia.org/wiki/Chi-squared_distribution
This table is provided only for completeness. It is common for statistics
textbooks to include this table, so this library does as well. It is better
to use the χ² distribution CDF function when a χ² value is required.
Table values referenced from: https://www.medcalc.org/manual/chi-square-table.php
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getChiSquareValue()
публичный статический Метод
