network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 3 months |
| seen | Dec 27 '12 at 3:19 | |
| stats | profile views | 5 |
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Jul 26 |
revised |
Matrix Multiplication in 3 Dimensions added 469 characters in body |
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Jul 26 |
awarded | Scholar |
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Jul 26 |
awarded | Supporter |
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Jul 26 |
accepted | Matrix Multiplication in 3 Dimensions |
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Jul 25 |
asked | Matrix Multiplication in 3 Dimensions |
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Feb 8 |
awarded | Student |
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Feb 8 |
comment |
Why does sample standard deviation underestimate population standard deviation? @joriki: that first part about taking all data as one big single sampling makes a lot of sense! Thanks! I know how to deal with the skewing (since it is in the article I linked). What I do not know is WHY the skewing exists? Please see my edited question. |
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Feb 8 |
awarded | Editor |
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Feb 8 |
revised |
Why does sample standard deviation underestimate population standard deviation? re-framed question after getting some responses |
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Feb 8 |
comment |
Why does sample standard deviation underestimate population standard deviation? @Andre: I now understand that s^2 is a RV whose mean is the population variance while the value I obtain in my experiment would be a realized value of this RV. Thanks for making this distinction. |
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Feb 8 |
comment |
Why does sample standard deviation underestimate population standard deviation? So, do you mean that if I were to perform an experiment where I take many samplings from a population: if I first compute the unbiased estimator for population variance from each sampling; then get the mean of all these values; followed by taking the square root of this mean; I will get the unbiased estimator for population standard deviation? |
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Feb 8 |
asked | Why does sample standard deviation underestimate population standard deviation? |
