Hi all,
I have a simple question - at least I guess it's simple,
but right now I'm not finding an satisfying answer. I have
an sample distribution (N = 200) with a mean of 36,7, a
Stddev of 6,4 and a skewness of 1,4. What I wnat to know
is if the skewness differs significantly from zero.
SPSS gives me a standard error of 0,17 for the skewness,
so if I assume a normal distribution of the skewness estimation
I can at least say the confidence interval for the skewness does
not include zero. Now I'd love to know
(1) Where does the standard error I get from SPSS come
from? I think it should be a simple formula, but I don't find
it...
(2) Is this the appropriate way to test a skewness for significance?
SPSS online help says "A skewness value greater than 1 generally
indicates a distribution that differs significantly from a normal
distribution.
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