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November 20, 2014

November 20, 2014

Posted by **devon** on Friday, November 14, 2008 at 10:59pm.

what is

a) the arithmatic mean

b) the harmonic mean

c) geometric mean

- math -
**Reiny**, Saturday, November 15, 2008 at 8:34amfor the arithmetic mean on n numbers

... add up all the numbers, then divide by n

so arithmetic mean = (2+3+5+7+7+8+10)/7 =

the harmonic mean of n numbers is

n divided by the sum of the reciprocals of those numbers

so harmonic mean = 7/(1/2 + 1/3 + 1/5 + 1/7 + 1/7 + 1/8 + 1/10) =

the geometric mean of n numbers is

the nth root of the product of the numbers

so geometric mean = 7th root(2*3*5*7*7*8*10)

= 7th root(117600) = 5.3

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