Basically I have to prove that the sample variance of a sample is given by:

For my purposes it's sufficient to show that

Help is appreciated. Thanks in advance.

If I made any mistakes inputting the sums please let me know.

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- September 7th 2010, 11:51 AMIceflash234Prove the sample variance formula.
Basically I have to prove that the sample variance of a sample is given by:

For my purposes it's sufficient to show that

Help is appreciated. Thanks in advance.

If I made any mistakes inputting the sums please let me know. - September 7th 2010, 12:51 PMmr fantastic
- September 7th 2010, 01:52 PMIceflash234
- September 9th 2010, 03:06 AMmr fantastic
Your starting point should be the definition of sample variance: Sample Variance -- from Wolfram MathWorld

What progress have you made from this?