Statistics for ML Interview Questions and Answers (2026)

Statistics interview questions for machine learning on Type I vs Type II error, random number generation, and Bayesian vs frequentist inference.

3 questions on this page

What’s the difference between Type I and Type II error?

Type I error is a false positive, while Type II error is a false negative. Briefly stated, Type I error means claiming something has happened when it hasn’t, while Type II error means that you claim nothing is happening when in fact something is. A clever way to think about this is to think of Type I error as telling a man he is pregnant, while Type II error means you tell a pregnant woman she isn’t carrying a baby.

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How Random Number Generator Works, e.g. rand() function in python works?

It generates a pseudo random number based on the seed and there are some famous algorithm, please see below link for further information on this. [src]

What is the difference between Bayesian vs frequentist statistics?

Frequentist statistics is a framework that focuses on estimating population parameters using sample statistics, and providing point estimates and confidence intervals.

Bayesian statistics, on the other hand, is a framework that uses prior knowledge and information to update beliefs about a parameter or hypothesis, and provides probability distributions for parameters.

The main difference is that Bayesian statistics incorporates prior knowledge and beliefs into the analysis, while frequentist statistics doesn't.

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