Hi Leonard,
Leonard Mada schrieb:
Dear Calc team,
the following wording is ambiguous and it may be wrong altogether:
function description:
calculates the probability of a *sample* mean greater than the mean of
the given *sample*.
[EMPHASIS ADDED]
A long phrase for the application help would be:
For a given random sample of size n, drawn from a normally distributed
population with a known mean µ and standard deviation sigma, ZTEST
calculates the probability that another sample of the same size would
have a mean greater than the mean m of the given sample.
ZTEST calculates 1-NORMSDIST(z) where z = (m-µ)/(sigma/sqrt(n)).
The function ZTEST is not a Z-test, but you can calculate a value by
ZTEST, which you can use to perform a Z-test.
Do you know a better phrase, that *does not exceed two lines* for the
function wizard? We can explain the function in detail on the Wiki,
where you already find the formula and nice diagramms. The problem is,
to get a very short description, without given such useless phrases like
for TTest, where you find "Calculates the T test" in the function wizard
and "Returns the probability associated with a Student's t-Test." in the
application help.
kind regards
Regina
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