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The scores on the first take-home quiz were normally distributed with a mean of 10.62 and...

The scores on the first take-home quiz were normally distributed with a mean of 10.62 and a standard deviation of 2.68. If I were to give bonus points to every one whose grade on the take-home quiz was above 10, then what percentage of students would receive the bonus?(a)

Suppose that the bonus points were to be assigned to bottom 40% of the students. What is the approximate cutoff value that should be used to determine whether a student gets the extra credit?(b)

Math   Statistics-And-Probability   
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