Articles by Ponne, Bruno

Data Science Quiz For Humanities

November 22, 2025 | Ponne, Bruno

Test your skills with this interactive data science quiz covering statistics, Python, R, and data analysis. Progress Answered 0 of 15 1Which of the following best describes a z-score? A measure of central tendency The number of standard deviations a value is from the mean The square of the correlation coefficient A ... [...Read more...]

How to calculate Z-Scores in Python

November 28, 2024 | Ponne, Bruno

If you’ve worked with statistical data, you’ve likely encountered z-scores. A z-score measures how far a data point is from the mean, expressed in terms of standard deviations. It helps identify outliers and compare data distributions, making it a vital tool in data science. In this guide, we’...
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Text Mining in Python – TF-IDF

April 26, 2023 | Ponne, Bruno

Introduction “Changes are shifting outside the words.” Annie Lennox In the Visualizing Text Data lesson we learned how to use term frequency to identify the most frequent words in a document. However, this method only considers the frequency o...
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Visualizing Text Data

April 2, 2023 | Ponne, Bruno

Introduction “Words have no power to impress the mind without the exquisite horror of their reality.” Edgar Allan Poe One common way of distinguishing between history and prehistory is by the emergence of writing. In particular, in our modern ...
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