# st: Re: Bivariate versus univariate definition

 From "Martin Weiss" To Subject st: Re: Bivariate versus univariate definition Date Tue, 10 Feb 2009 20:04:42 +0100

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"I have a very basic statistics question. I have just started using stata, so thank you for your help."
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No need to apologize, welcome to the community. It is very good to have you on board. There is a dedicated command in Stata that does contain the "bi" in its name, -biprobit- which deals with two-equation probit models. So the "bi" stems from the two-equation thing, not from the # of covariates...
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HTH
Martin
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----- Original Message ----- From: "Anon Mouse" <anon556656@live.ca>
```To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, February 10, 2009 7:44 PM
Subject: st: Bivariate versus univariate definition

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I have a very basic statistics question. I have just started using stata, so thank you for your help.
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My question concerns the definition of bivariate versus univariate.

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When is one analysis considered bivariate, and when is another considered univariate?
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I have seen univariate describe tests involving 1 predictor and 1 output variable, but aI have also seen them described as basically descriptive statistics.
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I have seen bivaraite used to describe Chi2 tests.

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So what would I call logistic regression analysis involving only one predictor variable, e.g. high mpg (see example below)? Univariate, or bivariate analysis?
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What would I call Chi2 test?  Univariate, or bivariate analysis?

Thank you!

***BEGIN EXAMPLE

sysuse auto

generate highmpg=1 if mpg>=20
replace highmpg=0 if mpg
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