Hi. i wonder how come one doesn't divide with (n-1) when finding the sample mean variance.(adsbygoogle = window.adsbygoogle || []).push({});

2. Relevant equations

Shouldn't I divide with n -1 since it is samples i am dealing with?

3. The attempt at a solution

I don't really have any idea as to why the book uses n. I have googled but could not find anything. I can use the result i find when following the procedure in the book, but i don't understand why the sample mean variance is not treated as a regular sample from a population - which in previous chapters would mean division by n -1 when finding the "regular" variance.

Mons

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# Sample mean variance and division by (n-1)

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