(PECL stats >= 1.0.0)
stats_stat_paired_t — Returns the t-value of the dependent t-test for paired samples
stats_stat_paired_t ( array $arr1 , array $arr2 ) : float
Returns the t-value of the dependent t-test for paired samples arr1 and arr2.
arr1
The first samples
arr2
The second samples
Returns the t-value, or false if failure.
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https://www.php.net/manual/en/function.stats-stat-paired-t.php