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Skill readiness test

Data Scientist at SAIC

4 questions, about 3 minutes. This is a diagnostic, not a certification — it estimates your skill readiness, it does not guarantee you are qualified for or will be hired into this role.

1. Which library is most commonly used for tabular data manipulation in Python?
2. Which measure of central tendency is least affected by extreme outliers?
3. A p-value of 0.03 from a hypothesis test at a 0.05 significance threshold suggests:
4. What does `df.groupby('region')['sales'].sum()` return?