D.5. Simplified F Table (95% Confidence)
For comparing sigma from two samples (sizes = n1 and n2) (sample sizes equal within 20%).
If calculated Ft value exceeds the table value, assume difference.
| n | F | n | F | n | F |
|---|---|---|---|---|---|
| 6 | 5.05 | 26 | 1.96 | 60 | 1.54 |
| 7 | 4.28 | 27 | 1.93 | 70 | 1.49 |
| 8 | 3.79 | 28 | 1.90 | 80 | 1.45 |
| 9 | 3.44 | 29 | 1.88 | 100 | 1.39 |
| 10 | 3.18 | 30 | 1.86 | 120 | 1.35 |
| 11 | 2.98 | 31 | 1.84 | 150 | 1.31 |
| 12 | 2.82 | 32 | 1.82 | 200 | 1.26 |
| 13 | 2.69 | 33 | 1.80 | 300 | 1.21 |
| 14 | 2.58 | 34 | 1.79 | 400 | 1.18 |
| 15 | 2.48 | 35 | 1.77 | 500 | 1.16 |
| 16 | 2.40 | 36 | 1.76 | 750 | 1.13 |
| 17 | 2.33 | 37 | 1.74 | 1000 | 1.11 |
| 18 | 2.27 | 38 | 1.73 | 2000 | 1.08 |
| 19 | 2.22 | 39 | 1.72 | ||
| 20 | 2.17 | 40 | 1.70 | ||
| 21 | 2.12 | 42 | 1.68 | ||
| 22 | 2.08 | 44 | 1.66 | ||
| 23 | 2.05 | 46 | 1.64 | ||
| 24 | 2.01 | 48 | 1.62 | ||
| 25 | 1.98 | 50 | 1.61 |
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