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Fmax table
Test for homogeneity of variance

In Analysis of Variance, find s2 for each treatment. Divide the largest value of s2 by the smallest value of s2 to get a variance ratio (F). It is safe to assume that the variance is homogeneous if the calculated F value is smaller than the value in the table at n-1 degrees of freedom (where n is the number of replicates in each treatment)

Degrees of Freedom n-1

Number of treatments
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  2 3 4 5 6 7 8 9 10 11 12
2 39.0 87.5 142 202 266 333 403 475 550 626 704
3 15.4 27.8 39.2 50.7 62.0 72.9 83.5 93.9 104 114 124
4 9.6 15.5 20.6 25.2 29.5 33.6 37.5 41.1 44.6 48.0 51.4
5 7.2 10.8 13.7 16.3 18.7 20.8 22.9 24.7 26.5 28.2 29.9
6 5.82 8.38 10.4 12.1 13.7 15.0 16.3 17.5 18.6 19.7 20.7
7 .99 6.94 8.44 9.70 10.8 11.8 12.7 13.5 14.3 15.1 15.8
8 4.43 6.00 7.18 8.12 9.03 9.78 10.5 11.1 11.7 12.2 12.7
9 4.03 5.34 6.31 7.11 7.80 8.41 8.95 9.45 9.91 10.3 10.7
10 3.72 4.85 5.67 6.34 6.92 7.42 7.87 8.28 8.66 9.01 9.34
12 3.28 4.16 4.75 5.30 5.72 6.09 6.42 6.72 7.00 7.25 7.43
15 2.86 3.54 4.01 4.37 4.68 4.95 5.19 5.40 5.59 5.77 5.95
20 2.46 2.95 3.29 3.54 3.76 3.94 4.10 4.24 4.37 4.49 4.59
30 2.07 2.40 2.61 2.78 2.91 3.02 3.12 3.21 3.29 3.36 3.39
60 1.67 1.85 1.96 2.04 2.11 2.17 2.22 2.26 2.30 2.33 2.36
1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

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