SBE10 CP13

SBE10 CP13 - Chapter 13 Experimental Design and Analysis of...

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Unformatted text preview: Chapter 13 Experimental Design and Analysis of Variance Chapter 13 Experimental Design and Analysis of Variance Case Problem 1: Wentworth Medical Center Descriptive statistics for the individuals in reasonably good health (MEDICAL1) are shown below: Variable N Mean Median TrMean StDev SEMean FL 20 5.550 6.000 5.556 2.139 0.478 NY 20 8.000 8.000 7.944 2.200 0.492 NC 20 7.050 7.500 7.000 2.837 0.634 Variable Min Max Q1 Q3 FL 2.000 9.000 3.250 7.000 NY 4.000 13.000 7.000 8.750 NC 3.000 12.000 4.250 8.750 Descriptive statistics for the individuals who had a chronic health condition (MEDICAL2) are shown below: Variable N Mean Median TrMean StDev SEMean FL 20 14.500 14.500 14.444 3.171 0.709 NY 20 15.250 14.500 15.111 4.128 0.923 NC 20 13.950 14.000 14.000 2.946 0.659 Variable Min Max Q1 Q3 FL 9.000 21.000 12.000 17.000 NY 9.000 24.000 12.250 17.750 NC 8.000 19.000 12.000 16.750 The depression levels for the individuals who had a chronic health condition are, on average, much higher than the depression levels of individuals in reasonably good health. The analysis of variance results for the individuals in reasonably good health (MEDICAL1) are shown below: Analysis of Variance Source DF SS MS F p Factor 2 61.03 30.52 5.24 0.008 Error 57 331.90 5.82 Total 59 392.93 Individual 95% CIs For Mean Based on Pooled StDev Level N Mean StDev -+---------+---------+---------+----- FL 20 5.550 2.139 (------*------) NY 20 8.000 2.200 (------*-------) NC 20 7.050 7....
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SBE10 CP13 - Chapter 13 Experimental Design and Analysis of...

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