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2-Way Mixed Effects ANOVA

2-Way Mixed Effects ANOVA. Comparison of 6 Breath Alcohol Testing Machines in 3 Subjects R.G. Gullberg (2008). "Employing Components-of-Variance to Evaluate Forensic Breath Test Instruments," Science and Justice, Vol. 48, pp. 2-7. Data Description and Statistical Model.

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2-Way Mixed Effects ANOVA

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  1. 2-Way Mixed Effects ANOVA Comparison of 6 Breath Alcohol Testing Machines in 3 Subjects R.G. Gullberg (2008). "Employing Components-of-Variance to Evaluate Forensic Breath Test Instruments," Science and Justice, Vol. 48, pp. 2-7

  2. Data Description and Statistical Model • Experiment was conducted to compare 6 breath alcohol machines in 3 subjects, with 10 measurements per subject per machine • Factor A – Machine with 6 Levels (Fixed Factor) • Factor B – Subject with 3 Levels (Random Factor) • Response – Blood Alcohol Concentration - 0.08=Legal Limit

  3. Analysis of Variance I – Expectations and Variances

  4. Analysis of Variance I – Expectations and Variances

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