Interview Q&A / Data Science
Data Science interview questions
Statistics, pandas, cleaning data and exploratory analysis for analyst and data science roles.
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- What does R-squared tell you, and what does it not tell you?
R-squared is the share of the variation in the target that the model explains, from 0 to 1. It says nothing about whether the model is correct, unbiased or good at predicting new data, and it never decreases when you add features.
BeginnerQuick answer1 min read