How to Statistically Test a 10% DAU Drop?
Tests your knowledge of hypothesis testing. A good answer outlines the steps: state a null hypothesis, choose a test (e.g., Z-test), calculate a p-value, and compare it to a significance level (alpha).
This tests your ability to apply a formal statistical hypothesis testing framework to a business metric. A great answer outlines the core steps: formulate a null hypothesis (no change), select an appropriate test (like a Z-test or t-test), calculate the test statistic and p-value, and then compare that p-value to a pre-determined significance level (e.g., alpha = 0.05) to decide whether to reject the null hypothesis. A red flag is jumping to conclusions based on intuition without providing the statistical method to prove it.
Read the original → Wikipedia: Statistical hypothesis test
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