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Randomly selected national sample - PowerPoint PPT Presentation

Section 8.1

Section 8.1. Day 4. What sample size should you use for a survey if you want the margin of error to be at most 2% with 90% confidence?. What sample size should you use for a survey if you want the margin of error to be at most 2% with 90% confidence?.

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GATHERING AND PRODUCING DATA

GATHERING AND PRODUCING DATA. How Data are Obtained. Census Everyone is included Observational Study Observes individuals and measures variables but does not attempt to influence responses Includes surveys and polls Experiment

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Randomly selected national sample - PowerPoint PPT Presentation

Section 8.1

GATHERING AND PRODUCING DATA