Linear regression, also called OLS (ordinary least squares) regression, is used to model continuous outcome variables. In the OLS regression model, the outcome is modeled as a linear combination of…
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The purpose of this workshop is to explore some issues in the analysis of survey data using StataNow 18.5. Before we begin, you will want to be sure that your…
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Hypothetical Scenarios Example 1 You are interested in studying drinking behavior among adults. Rather than conceptualizing drinking behavior as a continuous variable, you conceptualize it as forming distinct categories or…
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Example A researcher is trying to develop a new, less expensive, test to detect a particular chemical in soil samples. The old test correlates to the criterion (i.e., gold standard…
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Welcome to the Introduction to Stata 18 workshop! Powerpoint slides for this workshop Code file for this workshop. Copy-and-paste the contents into the Stata do-file editor or right-click to download.

The purpose of this workshop is to explore some issues in the analysis of survey data using Stata 17. Before we begin, you will want to be sure that your…
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Purpose This seminar will show you how to decompose, probe, and plot two-way interactions in linear regression using the margins command in Stata. This page is based off of the…
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ttest t-test anova Analysis of variance regress Regression predict Predicts after model estimation test Test linear hypotheses after model estimation contrast Contrasts and linear hypothesis tests after estimation margins Predicted…
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pwd Show current directory (pwd=print working directory) dir or ls Show files in current directory cd Change directory keep if Keep observations if condition is met keep Keep variables or…
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