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Re: st: Output from SKTEST
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: Output from SKTEST
Date
Sun, 1 Apr 2012 08:14:58 +0100
I agree with David's advice. It leads to an easy way to work this out yourself.
sysuse auto
foreach v of var price-foreign {
qnorm `v'
more
sktest `v'
}
Nick
On Sat, Mar 31, 2012 at 10:03 PM, David Hoaglin <[email protected]> wrote:
> Before you use tests based on sample skewness and kurtosis, it would
> be a good idea to look at a normal probability plot for each of the
> variables. A histogram may also be useful, but it is not sufficient,
> because it will not show you enough about the tails. You should look
> for outliers, as well as evidence of multimodality.
>
> David Hoaglin
>
> On Sat, Mar 31, 2012 at 4:33 PM, Sandy Y. Zhu <[email protected]> wrote:
>> Hi everyone:
>>
>> I'm having some trouble interpreting the output of Skewness/Kurtosis
>> test, can you tell me if the variables that I tested, rsize and
>> avg_cpi, are normally distributed?
>
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