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September 5, 2015

Homework Help: statistics

Posted by Sarah on Sunday, March 24, 2013 at 5:22pm.

The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an A grade to the top 10% of the scores, a B grade to the next 10% of the scores, a C grade to the next 10% of the scores, a D grade to the next 10% of the scores, and an F grade to all scores below the 60th percentile of this distribution. For a letter grade of B, find the lowest acceptable score within the established range

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