On Mon, 2007-09-07 at 10:39 -0400, Tom Lane wrote:
> When applied to "numeric" input, stddev_pop produces the same result as
> stddev_samp, and var_pop produces the same result as var_samp. This
> is because whoever wrote numeric_stddev_internal() forgot that the
> divisor is different for the sam
When applied to "numeric" input, stddev_pop produces the same result as
stddev_samp, and var_pop produces the same result as var_samp. This
is because whoever wrote numeric_stddev_internal() forgot that the
divisor is different for the sample case. This mistake is in fact
visible in the regressio
Hi Tom,
I only have one remark really, which I first thought of after sending
the report.
If you were to use the result for subtracting from the first value,
instead of adding to the second, the conditions are reversed. It's
not really as obvious as I first thought whether there's 2 months
