Articles

All articles by Wlademir Ribeiro Prates on applied data science, R, Shiny, and data applications in production.

Which hypothesis test should I use? A decision flow for business questions

Statistics

Data Science

A practical path from a business belief to a statistical test: how to choose between t-test, Wilcoxon, ANOVA, Kruskal-Wallis and proportion tests, with a worked example in R.

Unlocking the Highest-Paying Dividend Stocks with R

Data Visualization

Finance

Investing in stocks is more than just looking at price appreciation. Dividends are a crucial part of the equation.

Predictive Customer Churn Analysis

Reporting

Data Science

Machine Learning

Churn, or the loss of customers from a company’s customer base, is a critical metric for businesses with recurring revenue streams. Understanding why customers leave and pred…

Analyzing Unicorn Companies with treemaps in R

Reporting

Have you ever heard about Unicorn companies? This post shows a list of Unicorn companies around the world, analyzing them with data analysis techniques, using the R language.

Set up a website with Quarto and automate deployment

Reporting

Anyone who works with data analysis and wants to share content faces some limitations from the traditional tools to build a website. One of the main reasons is the…