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Re: st: RE: GLLAMM: logitic regression interaction non signficant but lincom gives signficant result


From   [email protected] (Brendan Halpin)
To   [email protected]
Subject   Re: st: RE: GLLAMM: logitic regression interaction non signficant but lincom gives signficant result
Date   Sat, 19 May 2012 19:40:07 +0100

On Sat, May 19 2012, Abdelouahid Tajar wrote:

> The main model says that the
> two slopes are not significantly different (interaction non significant0
> and because the slope of the reference is not significantly different
> from 0 this should mean that the slope of group1 is also not
> significantly different from 0 but the lincom result shows that the
> slope of group 1 is actually significantly different from 0, hence my
> confusion.

The fact that there is evidence that group 1 has an effect while there
is no evidence that group 2 has an effect, is not evidence that there is
a significant difference between group 1 and group 2. 

This is exactly what "the difference between significant and
not-significant is not significant" is referring to.

Brendan
-- 
Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147
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