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33 lines
1.6 KiB
HTML
33 lines
1.6 KiB
HTML
<div class="book-prose">
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<h2 id="checkpoints" class="book-prose__heading">Checkpoints</h2>
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<details class="book-question">
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<summary class="book-question__prompt">A survey about school meals only asks students in one class. Name one issue.</summary>
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<div class="book-question__solution">
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<p><strong>Answer:</strong> Sampling bias; sample may not represent the whole school.</p>
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</div>
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</details>
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<details class="book-question">
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<summary class="book-question__prompt">Two variables are strongly correlated. Can we conclude causation?</summary>
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<div class="book-question__solution">
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<p><strong>Answer:</strong> No, correlation alone is insufficient.</p>
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</div>
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</details>
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<details class="book-question">
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<summary class="book-question__prompt">A bar chart axis starts at 95 instead of 0. Why can this mislead?</summary>
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<div class="book-question__solution">
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<p><strong>Answer:</strong> Differences look much larger than they really are.</p>
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</div>
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</details>
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<details class="book-question">
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<summary class="book-question__prompt">“Risk increased from 1% to 2%.” State absolute and relative increase.</summary>
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<div class="book-question__solution">
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<p><strong>Answer:</strong> Absolute +1 percentage point; relative increase 100% (doubled).</p>
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</div>
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</details>
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<details class="book-question">
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<summary class="book-question__prompt">Name one way to improve reliability of a poll.</summary>
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<div class="book-question__solution">
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<p><strong>Answer:</strong> Use a larger random sample from the target population.</p>
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</div>
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</details>
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</div>
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