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Old December 12th 16, 07:42 AM posted to sci.astro
Poutnik[_5_]
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Default 1) the negative paraxes...

Dne 11/12/2016 v 22:50 Mike Dworetsky napsal(a):
Poutnik wrote:

The question remains,
why the data with parallax value within the measurement error
is not replaced by an appropriate note,
instead of publication of noise.


For exactly the reason I stated in the part of my reply that you
snipped: Negative values are unphysical, but form the part of the
statistical distribution of values that happen to lie below zero when
the mean is close to zero.


Positive and negative noise values are equally unphysical.

Imagine that someone plotted a graph of, say, a spectrum (with low S/N),
and wherever the plotted flux was below zero, they simply truncated it.
Would you be happy with that? I wouldn't.


IMHO He should truncated all measurements
with zero belonging to CI of the measurement (mean) value,
as with statistically insignificant difference to zero.

--
Poutnik ( The Pilgrim, Der Wanderer )

A wise man guards words he says,
as they say about him more,
than he says about the subject.