You randomly pick coin and flip it twice, and get heads both times.
You have two coins, one of which is fair and comes up heads with a probability 1/2, and the other which is biased and comes up heads with probability 3/4. Given a pool of 10 independent users, what is the probabilty that at least two will be a match? A match is declared between two users if they match on at least 4 adjectives. On a dating site, users can select 1 out of 10 adjectives to describe themselves. What is the probability of rolling a 4 or 7 for two 6 sided dice?. What is the probability that they have two girls? A couple tells you that they have two children, at least one of which is a girl. How far apart do the means need to be in order for this distribution to be bimodal? You have an 50-50 mixture of two normal distributions with the same standard deviation. What is the probability that you see at least one shooting star in the period of an hour? In any 15-minute interval, there is a 20% probability that you will see at least one shooting star. How would you estimate the disease probability in a city, given the probability is very low nationwide?. 
What is a confidence interval and how do you interpret it?. What are the assumptions of a logistic regression?. Be prepared to answer conditional probability questions and Bayesian probability questions. How would you explain a logistic regression to a non-technical person?. What are the assumptions of linear regression?. How would you explain a linear regression to a non-technical person?. What is Type I error and how is it different from Type II error?. What is sampling? Can you provide an example of a sampling method? Can you provide an example of a time in the past where you needed to use sampling?. What is r^2? What are some other metrics that could be better than r^2 and why?. You don't necessarily have to be an expert in statistics, but use the job description to gauge the level of familiarity necessary. A general familiarity with stats will be necessary for any data analyst. 
Statistics are the guiding principles to collection, organizing, and interpreting data. If you're interested in practicing further (and having the option to receive solutions), sign up for our email newsletter, where we send a few interview questions per week. This guide contains 45 data analyst interview questions, broken out by high-level topics. Interviewing for a role as a analyst? You've come to the right place! Below we've curated a list of data analyst interview questions from multiple sources to help make your preparation easier.įor a data analyst interview, the interviewer will ask a wide range of topics covering statistics, programming (Python and/or SQL), data modeling, and overall business acumen.
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