QUESTION 24 OF 30

In your opinion, is mean square error a good or bad measure of model performance?

As with any career or profession, the techniques and methodologies used may differ between individuals. Interviewers at Robinhood will ask you questions similar to this one to learn more about your expertise and how you go about doing your job. They are also interested in your opinion on certain topics, some of which may be controversial. When you answer this type of question, it is best to give your honest opinion. Trying to please the interviewer may work during the interview, but it may cause issues once you are hired.

"I believe that the mean square error, or MSE, is a flawed measure of a decision model's performance. The problem with using MSE for this purpose is that it weighs larger errors more than smaller ones. This results in applying emphasis on the large deviations in the data. I prefer to use mean absolute deviation, or MAE, which is a more robust model and provides a more accurate measure of a model's performance."

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Robinhood Data Scientist Mock Interview

In your opinion, is mean square error a good or bad measure of model performance?

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