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Model Perspective
Model Perspective
Aug 31, 2023 · Artificial Intelligence

Master Feature Selection: From Filters to PCA with Python

This article explains why selecting the right features is essential for machine learning, outlines the general workflow, compares filter, wrapper, and embedded methods, demonstrates statistical tests and Python code examples, and shows how PCA can synthesize features for dimensionality reduction.

PCAPythonchi-square
0 likes · 18 min read
Master Feature Selection: From Filters to PCA with Python
Model Perspective
Model Perspective
Dec 9, 2022 · Fundamentals

How to Perform a 2×2 Chi‑Square Test in SPSS: Step‑by‑Step Guide

This guide explains how to conduct a 2 × 2 chi‑square test in SPSS, covering data entry, weighting, step‑by‑step menu selections, cell options, result interpretation, and decision rules for choosing the appropriate test based on sample size and expected frequencies.

2x2 contingency tableSPSSchi-square
0 likes · 6 min read
How to Perform a 2×2 Chi‑Square Test in SPSS: Step‑by‑Step Guide
Model Perspective
Model Perspective
Sep 11, 2022 · Fundamentals

How to Compute Cramér’s V for Categorical Data: Steps and Example

This article explains the Cramér’s V coefficient, a measure of association between categorical variables, outlines its formula, clarifies key points about the denominator and scaling, provides a step‑by‑step calculation procedure, and demonstrates the method with a practical restaurant survey example.

Cramér's Vassociation measurecategorical data
0 likes · 3 min read
How to Compute Cramér’s V for Categorical Data: Steps and Example