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What is the relationship between variance and standard deviation?
 2 years ago
 2 years ago
What is the relationship between variance and standard deviation?
 2 years ago
 2 years ago

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EbnorEqvineBest ResponseYou've already chosen the best response.1
Standard deviation = sqrt(variance), variance = standard deviation^2
 2 years ago

ConfuciousBest ResponseYou've already chosen the best response.0
oh cool. i was expecting something long and complicated, like what they actually do, what their purpose is
 2 years ago

EbnorEqvineBest ResponseYou've already chosen the best response.1
Well, say you have a data set, say, {1,2,3,4,5,6}.. the standard deviation of this data set would simply be the square root of the sum of the differences between each element and the average squared, divided by the number of elements....
 2 years ago

EbnorEqvineBest ResponseYou've already chosen the best response.1
Well, say you have a data set, say, {1,2,3,4,5,6}.. the standard deviation of this data set would simply be the square root of the sum of the differences between each element and the average squared, divided by the number of elements....\[\sigma = \sqrt{((x _{1}x)^2+(x _{2}x)^2...+(x _{k}x)^2)/k}\]
 2 years ago

EbnorEqvineBest ResponseYou've already chosen the best response.1
x being the average, k being the number of elements in the data set, and that funny looking symbol (sigma) signifying standard deviation. k divides the sum of all of those numbers, just in case it isn't clear.
 2 years ago
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