Blog Archives

A bit more understanding of Cronbach’s alpha

March 27, 2019
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A bit more understanding of Cronbach’s alpha

Cronbach’s alpha reliability coefficient is one of the most widely used indicators of the scale reliability. It is used often without concern for the data (this will be a different text) because it is simple to calculate and it requires only one implementation of a single scale. The aim of this article is to provide … Continue reading A...

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In memory of Monty Hall

February 12, 2019
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In memory of Monty Hall

Some find it a common knowledge, some find it weird. As a professor I usually teach about Monty Hall problem and year after year I see puzzling looks from students regarding the solution. Image taken from http://media.graytvinc.com/images/690*388/mon+tyhall.jpg The original and most simple scenario of the Monty Hall problem is this: You are in a prize … Continue reading In...

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The Illusion of linearity trap when making bubble charts in ggplot2

March 8, 2018
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The Illusion of linearity trap when making bubble charts in ggplot2

Bubble charts are a great way to represent the data when you have instances that vary greatly, eg. the size of Canada compared to the size of Austria. However this type of a chart introduces a new dimension in the interpretation of data because the data is interpreted by the bubble size (area), and not … Continue reading The...

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