Interview Q&A / Data Science
Data Science interview questions
Statistics, pandas, cleaning data and exploratory analysis for analyst and data science roles.
Prefer rapid revision? Practise Data Science short interview answers →
- How do you decide whether an A/B test result on conversion rate is significant?
Compare the two conversion rates with a two-proportion z-test: z is the difference in rates divided by the pooled standard error. A p-value below your preset alpha, with a practically useful lift, supports shipping the change.
IntermediateQuick answer1 min read