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latest blog posts

Member Training: Introduction to Stata Software Tutorial

September 30, 2022 • TAF Support

In this 8-part tutorial, you will learn how to get started using Stata for data preparation, analysis, and graphing. This tutorial will give you the skills to start using Stata on your own. You will need a license to Stata and to have it installed before you begin. Read More

An Example of Specifying Within-Subjects Factors in Repeated Measures

September 19, 2022 • Karen Grace-Martin

I want to do a GLM (repeated measures ANOVA) with the valence of some actions of my test-subjects (valence = desirability of actions) as a within-subject factor. My subjects have to rate a number of actions/behaviours in a pre-set list of 20 actions from ‘very likely to do’ to ‘will never do this’ on a scale from 1 to 7,.. Read More

How the Population Distribution Influences the Confidence Interval

September 6, 2022 • Jeff Meyer

Spoiler alert, real data are seldom normally distributed. How does the population distribution influence the estimate of the population mean and its confidence interval? To figure this out, we randomly draw 100 observations 100 times from three distinct populations and plot the mean and corresponding 95% confidence interval of each sample. Read More