Hi Eike, hi Leonard,
Eike Rathke schrieb:
Hi Leonard,
On Tuesday, 2009-08-25 15:45:42 +0200, Leonard Mada wrote:
I would therefore stick with the one sample definition,
and adapt only the text to correspond to what actually
the function computes.
"The p-value is the probability, under the null hypothesis,
of observing a value as extreme or more extreme of the
z-statistic"
Probably too long, taking localizations into account.
or shortened:
"calculates the probability of observing a value as extreme
or more extreme of the z-statistic"
and (possibly) correcting for the wrong implementation:
"calculates the probability of observing a value as large
or larger for the z-statistic"
Not being a native speaker the difference isn't clear to me.
"extreme" can be very small or very large. But our ZTEST only calculates
the "larger" case.
To have this changed we need a decision real soon now. So far then I'd
go for
"calculates the probability of observing a value as large
or larger for the z-statistic"
Any objections? Adding that to i90759 to have it documented.
There is a comparison "observing a value larger" but it does not
contain, to what it is compared. There must be something like "observing
a value larger than ...".
I think "as large as..." can be dropped, it makes no difference for a
continuous distribution and the text becomes shorter.
Is "for the z-statistic" an attribute to "a value"? I understand it so.
Is it a typical sentence order in English to put it at the end?
In German I would say "Berechnet die Wahrscheinlichkeit einen Wert der
Gauß-Statistik zu beobachten, der größer ist als der Wert der
Gauß-Statistik der Stichprobe." But I'm not sure, Leonardo wants to say
this. ("Z-Statistik" does not exist in German.)
Describing the function using 'z-statistic' is indeed better than using
a description with 'mean', because of the function name ZTEST.
kind regards
Regina
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