2. How does variance analysis work?
2.1 Simple case: study of a single factor
From an Excel spreadsheet studying a single "operator" factor with three repetitions r 1, r 2 and r 3 (see figure Design of experiments studying one factor), we are able to identify qualified variations:
intra-series, dispersion within a data series (represented by an oval);
of interseries, dispersion of averages for each series (represented by a rectangle).
The sum of these dispersions is referred to as overall or total variation.
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How does variance analysis work?
How do you carry out an analysis of variances?
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Analysis of variance of a design of experimentsThis Excel file allows you to evaluate the influence of four factors at three levels, with repeated results.
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