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

statistics  test, Saturday, April 5, 2014 at 3:24pm
76.8