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 are the main sampling methods: simple random, stratified, cluster and systematic?
Simple random gives everyone an equal chance; stratified splits the population into groups and samples each; cluster picks whole groups at random; systematic takes every kth item. Each trades cost against precision.
BeginnerQuick answer1 min read