A professor grades students on a normal curve. For any grade x, based on a coarse...

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A professor grades students on a normal curve. For any grade x, based on a coarse mean and standard deviation developed over years of testing. The following applies A: x > x + 1.6ơ B:え+0.40 < x < x +1.60 1. F: x x-1.6σ How many A, C, and D grades are given per 100 students?

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Grade Grading Rule Out of 100 Out of 100 X> Mean+1.6 5.479929 Mean+0.4? to Mean+1.6? 28.9779 29 Mean-0.4? to Mean+0.4?31.08435 31 Mean-1.6? to Mean-0.4?28.9779 29 X < Mean -1.6 5.479929 100 The above table gives the number of students out of 100 receiving different grades.

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