Rafael Rodrigues Troiani
This site is an index of things on the web that I've created or that my nerdy self think is super interesting and deserves more visibility
My creations
YouTube channel in pt-br with videos made by me to teach business analysis for people starting to work in the field or who want to up their game.
Online calculator for finding the minimum quantity of observations for your test to be statistically significant. Unlike other online calculators, this one guides the user to the right interpretation of the results in the form of a well-structured phrase.
Web application for creating classification trees using CHAID (Chi-squared Automatic Interaction Detection) algorithm, the same one used by IBM's SPSS software. Easy CHAID was developed by me in Javascript.
Have you ever found yourself trying to remember the syntax to join two [or more] tables? Keep this cheat sheet handy on your favorites bookmark or printed out near your workstation for a quick reference.
Comparison of online stat. sig. calculators
A large table comparing the most popular online calculators for sample size, statistical significance, confidence interval and other metrics related to testing.
Interesting thinks that I think deserve more visibility
Causal Inference for the Brave and True
A book about statistics in the lightest possible way to approach a dense, yet very interesting topic. It was written by a former colleague of mine from Nubank.
Desmos Graphing Calculator
A website that creates beautiful charts from inputting equations. It allows not only simple second-degree equations like this , but also trigonometric, polar plots,
integrals, and simple model fitting. Amazing!
Web application for creating beautiful equation images with transparent background like this from LaTeX markup like this
\overline{x}=\frac{\sum{x_i}}{n}.
About
Rafael Rodrigues Troiani is an enthusiast for programming, data science, economics, business analysis, and other nerdy things. Msc. in Economics and Finance from Insper, Bachelor of Business Administration from FEA-USP, and certified Data Scientist. Works at a large financial institution and develops video courses, web pages, and some art (see Instagram) in his spare time.
