رد: احصاء 110 : شرح + استفسارات + اسئلة
to qualify for a police academy . candidates must score in the top 10% on a general abilities test. the test has a mean of 200 and a standard deviation of 20 . find the lower possible score to qualify .Assume the test scores are normally distributed
ممكن اححد يشرححو >_< '
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