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 is a residual, and what can a residual plot tell you?
A residual is actual minus predicted. Plotting residuals against fitted values should look like random scatter around zero; curves, fans or clusters reveal non-linearity, changing variance or missing variables.
IntermediateQuick answer1 min read