Statistics

Bayesian Considering for People Who Hated Statistics

hall, Tuesday morning. The professor uncaps a marker and writes across the whiteboard: . Your hand copies the formula. Your brain checks out somewhere across the vertical bar. If that memory just surfaced, you’re in...

A Tale of Two Variances: Why NumPy and Pandas Give Different Answers

you're analyzing a small dataset: ] You must calculate some summary statistics to get an idea of the distribution of this data, so you utilize numpy to calculate the mean and variance. import numpy as np X...

Exploratory Data Evaluation for Credit Scoring with Python

project, it is commonly tempting to leap to modeling. Yet step one and crucial one is to know the info. In our previous post, we presented how the databases used to construct credit scoring...

Why Most A/B Tests Are Lying to You

Thursday. A product manager at a Series B SaaS company opens her A/B testing dashboard for the fourth time that day, a half-drunk cold brew beside her laptop. The screen reads: Variant B,...

When Data Lies: Finding Optimal Strategies for Penalty Kicks with Game Theory

Introduction Penalties are amongst probably the most decisive and high-pressure moments in football. A single kick, with only the goalkeeper to beat, can determine the consequence of a whole match or perhaps a championship. From...

Methods to Define the Modeling Scope of an Internal Credit Risk Model

going through a deep transformation driven by technological progress. These changes affect all sectors, especially the banking industry. Data professionals must quickly adapt to grow to be more efficient, productive, and competitive. For knowledgeable...

Understanding the Chi-Square Test Beyond the Formula

who has written a children’s book and released it in two versions at the identical time into the market at the identical price. One version has a basic cover design, while the opposite...

Modeling Urban Walking Risk Using Spatial-Temporal Machine Learning

After dinner in downtown San Francisco, I said goodbye to friends and pulled out my phone to work out how you can get home. It was near 11:30 pm, and Uber estimates were unusually...

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