Concept explainers
9:00 AM versus 9:00 PM (H). You take a survey of students in the library at 9:00 AM on a Saturday morning and ask: How many hours per week do you study? You ask the same question at 9:00 PM at a wild party. What would you expect to see in your data? Explain the biases.
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The Heart of Mathematics: An Invitation to Effective Thinking
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