Question

A boarding school will only admit students who place at least 2.5 standard deviation above the mean on a standardized test that has a mean of 190 and a standard deviation of 20. What is the minimum score that an applicant must make on the test to be accepted?

Answer 1

Solution : of test (M) = 190 mean score on on test (o)=20 standard deviation of scores which is 25 standard deviations * score, i's above the mean U + (2.5) a 190 + (2.5) 20 = - 240 having students Since school admit only than 2.5 standard deviation score more above fewm mean, an applicant s The minimum score erequired for to be accepted 240