On Academic Standards

Part Three

 Examination Profiler

How can one generate a "C" standard normal distribution of grades? First, one can take the raw scores from an exam and calculate the mean, median, mode, standard deviation, and coefficient of variation. The quick check for a normal distribution is to see whether the mean, median, and mode are approximately equal to each other. If this is the case, one then can move up and down the mean by one standard deviation to generate the C+, C, and C- raw score grades and assign their numerical equivalents on a 4-point scale. At the second standard deviation level one has the "B" and "D" range, and at the third standard deviation, one has the "A" and "F" range. A downloadable spreadsheet module provides a numerical illustration, complete with an automatic examination histogram generator.

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