Completing the anova
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Completing the ANOVA. From the Summary Statistics. Necessary Information. It is possible to complete the Analysis of Variance table for simple regression from the summary statistics. You need the correlation coefficient, the sample size, and the sample variance for the response variable, y.

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Completing the ANOVA

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Completing the anova

Completing the ANOVA

From the Summary Statistics


Necessary information

Necessary Information

  • It is possible to complete the Analysis of Variance table for simple regression from the summary statistics.

  • You need the correlation coefficient, the sample size, and the sample variance for the response variable, y.

  • You do not need any summary statistics for the predictor variable, x.


Summary statistics

Summary Statistics

  • This explanation will assume the following values.

  • Pearson’s correlation coefficient is 0.314

  • The sample size is 28

  • The variance of the response variable is 20.3401


Anova

ANOVA

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova1

ANOVA

The regression df is always 1 for simple regression

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova2

ANOVA

The total df is n-1.28 - 1 = 27

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova3

ANOVA

Use subtraction to find the residual df27 - 1 = 26

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova4

ANOVA

The total MS is the variance on the response variable

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova5

ANOVA

Find the SS by multiplying the MS by the df27 x 20.3401 = 549.1827

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova6

ANOVA

R2 = SS(Reg) / SS(Total)0.3142 = SS(Reg) / 549.1827SS(Reg) = 0.3142 x 549.1827SS(Reg) = 54.1472

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova7

ANOVA

Use subtraction to findthe residual SSSS = 549.1827-54.1472SS = 495.0355

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova8

ANOVA

Divide SS by df to find MS54.1472 / 1 = 54.1472

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova9

ANOVA

Divide SS by df to find MS495.0355 / 26 = 19.0398

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


Anova10

ANOVA

F is found by dividing the two variancesF = 54.1472 / 19.0398F = 2.8439

Correlation coefficient = 0.314, sample size = 28,variance of response variable = 20.3401


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