Mathematics, 17.04.2020 23:44 kenny8556

Suppose that the class average for PSYC292 at the end of the course was 58% with a standard deviation of 19%. The instructor decides to rescale the scores to have a new mean of 72%.
a. If the instructor wants 10% of the class to earn a grade of 88% or greater, what should they set the standard deviation to?
b. If the original grade was 75%, what will the rescaled grade be? If the rescaled grade is 75%, what was the original grade? Round your answers to the nearest whole percentage. Note: If you were unable to compute a standard deviation in part (a), use a SD of 10 for the rescaled scores.

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Suppose that the class average for PSYC292 at the end of the course was 58% with a standard deviatio...