Geometric mean

Revision as of 11:25, 22 June 2006 by Ragnarok23 (talk | contribs) (Made it nice and LaTeXy, detailed a little more)

Given a set of n numbers, the Geometric Mean is the nth root of the product of the numbers. It is analogous to the Arithmetic Mean, except with products.

Examples

Find the geometric mean of the numbers $x_1, x_2, x_3, x_4 ... x_n$ We want the nth root of the product of the n numbers. There are n numbers so our geometric mean would be $\sqrt[n]{x_1 x_2 x_3 x_4 ... x_n}$


Find the geometric mean of the numbers 6, 4, 1 and 2. There are 4 numbers, so we want the 4th root. The numbers' product is 48, so our answer is $\sqrt[4]{48}=2\sqrt[4]{3}$

The Geometric Mean is a component of the well-known Arithmetic Mean-Geometric Mean Inequality.

Practice Problems

See Also

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