is given by:
NB: The geometric mean of a data set is less than the data set's arithmetic mean unless all members of the data set are equal, in which case the geometric and arithmetic means are equal.
Worked Example
A maths tutor observed that during the last academic year a student increased his score by 20% in the first semester, 30% in the second semester and 50% in the third semester. What is the average increase in the performance of the student?
Solution 1
Arithmetic Mean
Solution 2
Geometric Mean
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