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Wednesday, Nov. 28 Analysis of Variance

Wednesday, Nov. 28 Analysis of Variance. Wednesday, Nov. 28 The Analysis of Variance. Wednesday, Nov. 28 The Analysis of Variance. ANOVA. Between-group variance estimate. F =. within-group variance estimate. _. SS T =  (X - X G ) 2 SS B =  N i (X i - X G ) 2

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Wednesday, Nov. 28 Analysis of Variance

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  1. Wednesday, Nov. 28 Analysis of Variance

  2. Wednesday, Nov. 28 The Analysis of Variance

  3. Wednesday, Nov. 28 The Analysis of Variance ANOVA

  4. Between-group variance estimate F = within-group variance estimate _ SST =  (X - XG)2 SSB=  Ni (Xi - XG)2 SSW= (X1 - X1)2 + (X2 - X2)2 + •••• (Xk - Xk)2 SST = SSB +SSW _ _ _ _ _

  5. Between-group variance estimate F = within-group variance estimate MSB = SSB / dfB MSW = SSW / dfW where dfB = k-1 (k = number of groups) dfW = N - k

  6. _ _ Xi - Xj t = MSW ( 1/Ni + 1/Nj) Fisher’s Protected t-test Where df = N - k

  7. dfB (F - 1) Est ω = dfB F + dfW Est ω bears the same relationship to F that rpb bears to t.

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