[SciPy-user] information on statistical functions

Sturla Molden sturla@molden...
Fri Dec 19 12:05:37 CST 2008


On 12/19/2008 6:51 PM, Robert Kern wrote:

> How does the current version strike you?
> 
> http://docs.scipy.org/numpy/docs/numpy.core.fromnumeric.std/
> http://docs.scipy.org/numpy/docs/numpy.core.fromnumeric.var/

It looks accurate. :)

Also it mentions that ddof=0 gives the ML estimate, which is often 
overlooked.

A warning about what ddof=1 may/will do to the standard error of the 
variance would also be useful. Estimating the variance unbiased can be 
equivalent of throwing away a substantial portion of the data; which in 
turn may translate to a lot of lost investment in work and money.


Sturla Molden




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