LectureSept17

# LectureSept17 - BME 423 Lecture Notes Sept 17 2008...

This preview shows pages 1–3. Sign up to view the full content.

1 Hypothesis Testing Differences Between Groups BME 423 Lecture Notes - Sept. 17, 2008 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 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 == = " Alternative hypo: at least 2 diff ' s

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 22 1 1 m wit i i s s m = = 3. Calculate the within groups variance 1 1 m i i Xx m = = 4. Compute the overall (grand) mean 6. Calculate the between groups variance 2 2 X bet ns s = 5. Compute standard error of the mean () 2 2 1 1 1 m i X i s xX m = =− 7. Compute the F Statistic 2 2 bet wit s F s = 1 (1 ) n d m mn ν = = Obtained form F Table Denominator degrees of freedom 8. Compare F with the Fcrit (critical value of F) .05 (, ) crit n d FF νν ) crit n d α In general
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 6

LectureSept17 - BME 423 Lecture Notes Sept 17 2008...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online