Concept explainers
Sleazy survey (H). The mayor of a city seeks to know the hot issue for the next election. He sends a letter to each of the 100,000 households in the city asking whether pornography vendors should be shut down. A majority of the 8000 respondents say to shut down the sleaze. The mayor runs on the clean-up-the-dirt platform and loses badly. What went wrong?

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Chapter 9 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking, WileyPLUS NextGen Card with Loose-leaf Set Single Semester: An Invitation to Effective Thinking (Key Curriculum Press)
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Elementary Statistics
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