Message-ID: <9f1c9e12-124f-1b7c-3a92-108fb84a2153@gmail.com>
Date: 2020-07-08T22:51:36Z
From: Ben Bolker
Subject: A graphic for Random intercepts via distributions
In-Reply-To: <CACgv6yWPT+u=nxfscpHy=OpxMaDRBCLuSyrWNWsJEyDoHFhnuw@mail.gmail.com>
? ? Can you clarify your concern?
I can see things to quibble about here (the scales of the level-2 and
level-1 diagrams are different; I don't know why they're using e_{ij}
for the residual error of individual i in school j but U_{0j} for the
deviation of school j around the grand mean; it's a little confusing to
have "level 1" above "level 2" in the text but level 2 above level 1 in
the picture; it's potentially confusing for the arrow showing the
deviation from the baseline to intersect with the population density
curve [technically, the deviation doesn't have a "level", so could be
drawn instead as an arrow between two vertical lines rather than from a
line to a particular point ...
... but nothing that seems actively misleading.
? Others may have other opinions or see something I'm missing.
On 7/8/20 6:27 PM, Simon Harmel wrote:
> Good afternoon,
>
> I came across a picture (https://github.com/hkil/m/blob/master/mlm.PNG)
> that tries to show the concept of random-intercept models using
> distributions.
>
> I think, however, the picture erroneously mixes regression concepts (e.g.,
> error terms) with distributional properties of those regression concepts.
>
> I appreciate confirmation from the expert members?
>
> Thanks,
> Simon
>
> [[alternative HTML version deleted]]
>
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