Question
Scores for men on the verbal portion of the SAT-I test are normally distributed with a...
Scores for men on the verbal portion of the SAT-I test are normally distributed with a mean of 509 and a standard deviation of 112.
(a) If 11 man is randomly selected, find the
probability that his score is at least 579.5
(b) If 13 men are randomly selected, find the
probability that their mean score is at least 579.5
13 randomly selected men were given a review course before taking
the SAT test. If their mean score is 579.5, is there a strong
evidence to support the claim that the course is actually
effective?
(Enter YES or NO)
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