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solution: Note: if the question being asked is the range from the mean,raw scores = mean +/- z score(sd).= 75 +/- 7(1.96).= 61.28 to 88.72.so.
95% of the grades will fall from 61.28 to 88.72.(note: but if the question being asked is what is the highest score so that 95% of the distribution is (equal to or ) lower than that score, then the correct answer is 86.5143)..
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