MolocoMediumStatistics & Probability00:00Welcome to your interview for the Data Scientist role at Moloco.
The question is on your right: Expected Rolls and Variance. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen. You have three graded attempts to score 7/10 or better.
Suppose you are rolling a fair six-sided die until you get a six. What is the expected number of rolls, and how does the variance change if the die is biased?