The grades of a quiz were 0, 1, 2, ..., 9, 10. The mean grade was 6.7, and the standard deviation Assuming the grades to be normally distributed, determine (a) the percentage of students scoring 6 ) the minimum grade of the top 10% of the class.

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The grades of a quiz were 0, 1, 2, .., 9, 10. The mean grade was 6.7, and the standard deviation
was 1.2. Assuming the grades to be normally distributed, determine (a) the percentage of students scoring 6
points, (b) the minimum grade of the top 10% of the class.
Transcribed Image Text:The grades of a quiz were 0, 1, 2, .., 9, 10. The mean grade was 6.7, and the standard deviation was 1.2. Assuming the grades to be normally distributed, determine (a) the percentage of students scoring 6 points, (b) the minimum grade of the top 10% of the class.
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