Statistics - Calculating Variance
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OMG YES, THANK YOU! Jesus, it's so easy when someone actually explains the equation in English.
11 months ago 12
All Comments (315)
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THANK YOU! VERY HELPFUL!
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This is wonderful, thanks very much.
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@yanivdar it is just n if it is the entire population or everything possibly involved, when it is saying n-1 that means it is a sample not the entire group
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my teacher gave me the formula without n-1...just n. Which one is correct?
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Fantastic!!! Thank you!! Was able to follow up the steps. Thank You!!!
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This was actually good! fully understand variance now!
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Is it fair to say that the variance at the end is squareoot(4.5) ?
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you probably just saved me passing my remedial math class. gassho!
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@patrickJMT degrees of freedom.
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@MoN1T0r It is a part of the summation i = 1 to n (1 is next to i and the n is on top of the sigma)
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Very helpful. Why is it n-1 and not divided by n....:(
tremerrion6 5 months ago
@tremerrion6 you use n-1 when taking a sample and you do not have the entire population. i forget the mathematical justification, but it makes the estimate more accurate.
patrickJMT 5 months ago 3