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Mean fall - PowerPoint PPT Presentation

THE z - TEST

THE z - TEST. Purpose : Compare a sample mean to a hypothesized population mean Design : Any design where a sample mean is found. Assumptions. 1. Independent observations 2. Normal population (or large N) 3. Population s is known. 4. Interval or ratio level data. How it Works.

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Mean fall - PowerPoint PPT Presentation

THE z - TEST