ANOVA Terms and Notations

The analysis of variance (ANOVA) computes parameters such as degree of freedom, sums of squares, mean squares, etc. and organises them in a standard tabular format. These parameters and their interrelationships are defined as shown below using the following notation  

The variance of each factor is determined by the sum of the square of each trial sum result involving the factor, divided by the degree of freedom of the factor. Thus  

The variance ratio is the variance of the factor divided by the error variance. 

The percent contribution of each factor is the ratio of the factor sum to the total, expressed in percentage. 

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