Answer
$Efficiency\:is\:the\:percent\:rating\:of\:a\:nonparametric\:test\:compared\:to\:its\:parametric\:counterpart.$
Work Step by Step
$The\:percent\:rating\:of\:the\:nonparametric\:test\:associated\:with\:the\:corresponding\:parametric\:test\:is\:termed\:as\:efficiency.$