In my opinion the most challenge question is to ask you to determine whether the difference of mean values of two columns is significant or not?
Data Scientists Interview Questions
54,235 data scientists interview questions shared by candidates
How to build up a model to predict credit card fraud?
What was your prior responsibility
Product sense part 5 : (fraud case) You got the results - how do you know if 1% improvement is good or bad
What is a Z-test? When would you use a Z test over a T test?
Say the DS team came up with a spam detection algorithm, what metrics would you use to measure success?
How can we tell if two users on Instagram are best friends? (answer question) Ok, how can we use this algorithm in the product?
What is the difference between Z test and T test?
the probability of getting a pair, a straight in 52 cards
1-Programming: Given data on Facebook members friending/defriending each other on Facebook, find out whether a given pair of members are currently friends. 2- Statistics: Very basic questions on treatment effects under various sampling schemes. 3-Research Design Question: How would you test whether having more friends now increases the probability that a Facebook member is still an active user after 6 months?
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