LectureSept16

LectureSept16 - BME 423 Lecture Notes Sept 16 2009...

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1 Hypothesis Testing Differences Between Groups BME 423 Lecture Notes - Sept. 16, 2009 II. Analysis of Variance (ANOVA or F Test) C. Summary III. Examples B. HR in Men and Women in BME 423 C. HDL Concentration and Exercise Question: Are these differences in CO due to diet or are these due to random variation in CO in the population? 11 x s ± 22 x s ± 33 x s ± 44 x s ± X Xs ± Is this variability in consistent with the variability observed within the individual sample ? j x i x 1 x 3 x 2 x 4 x bet x s ns = () 2 2 2 1234 1 4 wit s ssss =+ + +
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2 Is this variability in consistent with the variability observed within the individual sample ? j x i x X Xs ± Halothane vs Morphine H 0 : No difference in BP between halothane and morphine groups. 66.9 12.2 61 n=61 m=2
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3 2. Variance of each group 12 1 1 ,,, n mi i x xx x x n = ⎛⎞ = ⎜⎟ ⎝⎠ C. Summary of ANOVA (F Test) Experiment: m - # of treatment groups n - # number of subjects per group Null Hypothesis: RV X is measured H0: () 2 22 2 2 1 1 1 n i s ss s x x n = =− 1. Mean of each group m μ μμ
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This note was uploaded on 10/13/2009 for the course BME 423 at USC.

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LectureSept16 - BME 423 Lecture Notes Sept 16 2009...

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