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 the difference between a one-tailed and a two-tailed test?
A two-tailed test looks for a difference in either direction; a one-tailed test looks only for an increase or only for a decrease. The one-tailed p-value is half the two-tailed one, so the direction must be decided before seeing data.
IntermediateQuick answer1 min read