public static zScore ( number $M, number $μ, number $σ, boolean $table_value = false ) : float | ||
$M | number | Sample mean |
$μ | number | Population mean |
$σ | number | Population standard deviation |
$table_value | boolean | Whether to return a rouned z score for looking up in a standard normal table, or the raw z score value |
return | float |