Posted by devon on Friday, November 14, 2008 at 10:59pm.
In the set of numbers 2,3,5,7,7,8,10
what is
a) the arithmatic mean
b) the harmonic mean
c) geometric mean

math  Reiny, Saturday, November 15, 2008 at 8:34am
for 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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