In article
,
Teignmouth writes:
John,

If I use the SKEW function I get the following values:

Period Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1659-2009 (0.6) (0.5) (0.1) (0.1) 0.1 0.2 0.4 0.3 0.0 (0.1) 0.0
(0.2)
1971-2009 (0.8) (0.8) (0.2) 0.2 (0.1) (0.2) 0.8 0.4 (0.1) 0.0
(0.1) (0.8)

Now what do I do with the value and the Standard Deviation?

If I have a December mean for the period 1659-2009 of +4.1c, and the
STDEV is 1.7c, and the SKEW is -0.2c, do I get a revised STDEV of 1.5c
or 1.9c? Then do I use +4.1c and the revised STDEV x1 x2 x3 etc to
get the revised Standard Deviation thresholds?

Your help is much appreciated.

Thanks


Sorry, but my statistics knowledge is not good enough to help. I know
about "vanilla" Normal distributions, but not about skewed ones. I'm
sure that we have at least one or two stats experts here though.
--
John Hall
"I look upon it, that he who does not mind his belly,
will hardly mind anything else."
Dr Samuel Johnson (1709-84)