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Confucious Group Title

What is the relationship between variance and standard deviation?

  • 2 years ago
  • 2 years ago

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  1. EbnorEqvine Group Title
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    Standard deviation = sqrt(variance), variance = standard deviation^2

    • 2 years ago
  2. Confucious Group Title
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    that's all? okay!

    • 2 years ago
  3. EbnorEqvine Group Title
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    yes

    • 2 years ago
  4. Confucious Group Title
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    oh cool. i was expecting something long and complicated, like what they actually do, what their purpose is

    • 2 years ago
  5. EbnorEqvine Group Title
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    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
  6. EbnorEqvine Group Title
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    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
  7. EbnorEqvine Group Title
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    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
  8. Confucious Group Title
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    yh sure

    • 2 years ago
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