7. Among freshmen at a certain university, scores on the Math SAT followed the normal curve, with an average of 550 and an SD of 100. Fill in the blanks; explain briefly. (a) A student who scored 400 on the Math SAT was at the th per- centile of the score distribution. (b) To be at the 75th percentile of the distribution, a student needed a score points on the Math SAT. of about

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