Statistics questions

Statistics
Tutor: None Selected Time limit: 1 Day

a:top 7% of scores b: scores below the top 7 and above the bottom 62% c: scores below top 38 and bottom 23% d: scores below top 77 and above the bottom 7% f: bottom 7% of scores mean of 74.8 standard deviation of 7.9 find minimum score required for A

Mar 3rd, 2015

a: top 7% of scores   mean of 74.8 standard deviation of 7.9

Top 7% of scores corresponds to an area of (1 - 0.07) = 0.93   which has a z-score of 1.47

x1 = (1.47)(7.9) + 74.8 = 86.4

Mar 3rd, 2015

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