TABLE 6.
Colour vs hardness of the nucleus
| Colour | 1 Soft | 2 Medium | 3 Hard | Total |
|---|---|---|---|---|
| White | 143 | 2 | 0 | 145 |
| Yellow | 6 | 151 | 2 | 159 |
| Brown | 0 | 27 | 90 | 117 |
| Black | 0 | 0 | 8 | 8 |
| 149 | 180 | 100 | 429 | |
Chi Square 665.82; DF 6; Statistical analysis not possible
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