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latest blog posts

Can Likert Scale Data ever be Continuous?

January 19, 2023 • Karen Grace-Martin

A very common question is whether it is legitimate to use Likert scale data in parametric statistical procedures that require interval data, such as Linear Regression, ANOVA, and Factor Analysis. A typical Likert scale item has 5 to 11 points that indicate the degree of something. For example, it could measure agreement with a statement, […] Read More

What is a Dunnett’s Test?

January 10, 2023 • guest contributer

I’m a big fan of Analysis of Variance (ANOVA). I use it all the time. I learn a lot from it. But sometimes it doesn’t test the hypothesis I need. In this article, we’ll explore a test that is used when you care about a specific comparison among means: Dunnett’s test. Read More

Member Training: Multinomial Logistic Regression

December 30, 2022 • TAF Support

Data analysts can get away without ever understanding matrix algebra, certainly. But there are times when having even a basic understanding of how matrix algebra works and what it has to do with data can really make your analyses make a little more sense. Read More