Re: normal distribution doubts

On Sun, 19 Aug 2007 19:07:14 -0700, s99999999s2003@xxxxxxxxx wrote:

hi, i am a learner..have some doubts on normal distribution
characteristics
I read that if probability distribution of population is normal, then
its mean, median and mode are equal and that the curve is symmtrical.
By "equal" , what does it mean? are the values equal?

For a sample, 'equal' means 'as equal as you
would expect, given sampling variability.'


If a curve has skewness, ie not symmetrical, does it mean its not
normal?

'not symmetrical (beyond sampling variation)' implies 'not normal'.

--
Rich Ulrich, wpilib@xxxxxxxx
http://www.pitt.edu/~wpilib/index.html
.

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