Statistics

normalcdf (80, 90, 75, 8) = 0.2356. Therefore, 23.56% of the class got B’s. (c) The teacher decides to give A’s to the top 10% of the class. Since you want to know what the top 10% of scores would look like, the area to the left would be 0.90. That is, a z-score of z = 1.285. giving x = 85.24. ................
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