Scores on an exam appear to follow a normal distribution, Basic Statistics

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Scores on an exam appear to follow a normal distribution

Scores on an exam appear to follow a normal distribution with μ = 60 and σ = 20.

The instructor wishes to give a grade of D to students scoring between the 10th and 30th percentiles on the exam.

For what range of scores should a D be given? What percentage of the students will get a D?

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Basic Statistics: Scores on an exam appear to follow a normal distribution

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Basic Statistics: Scores on an exam appear to follow a normal distribution

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