Question
A set of N = 20 exam scores has a mean of m = 50. The instructor discovered that an error was made grading one
A set of N = 20 exam scores has a mean of m = 50. The instructor discovered that an error was made grading one exam, so 20 points are added to that student's score. After adding the 20 points, what is the new mean for the class?
Hint: Write down the formula for the mean and fill in all known information. What is the new mean for the class?
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An Introduction to the Mathematics of financial Derivatives
Authors: Salih N. Neftci
2nd Edition
978-0125153928, 9780080478647, 125153929, 978-0123846822
