RE: st: My ANOVA and regression results don't agree

["Pepper, Jessica" <jkadis@live.unc.edu>]

The boxplots show similar distributions (median, size of quartile, and max value) for 4 of the 6 combinations. The other 2 are similar to one another.
Also, my data are not balanced; although there was random assignment to ad type, more women took the survey than men. In other aspects of my analysis (survey results), I am weighting my results to reflect this, but I was not planning to do this in the experiment.
Do these 2 aspects (distribution of DV and lack of balance) change the ANOVA/regression situation?

Jess

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of David Hoaglin
Sent: Wednesday, January 08, 2014 11:21 AM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: My ANOVA and regression results don't agree

Jess,

If you haven't done it already, I recommend that you look at parallel boxplots of your outcome variable (or plots of the data values) for each combination of adcontent and sex (i.e., one boxplot for each of the 6 combinations).

David Hoaglin

On Tue, Jan 7, 2014 at 10:42 AM, Pepper, Jessica <jkadis@live.unc.edu> wrote:
> Thank you both, David and Phil, for your responses. When I am back in the office and have access to Stata again tomorrow, I will play around with the drug/disease sample data set and try using the -contrast- command.
> I am new to Statalist and not sure of the etiquette -- if I have follow-up questions, is it best to send to the whole list or follow up individually?
> Thank you again.
> Jess
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