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Colour vs central nucleus width
| Colour | No of pts. | Mean width | SD |
|---|---|---|---|
| White | 145 | 2.65 | 0.27 |
| Yellow | 159 | 2.87 | 0.24 |
| Brown | 117 | 3.13 | 0.49 |
| Black | 8 | 3.5 | 0.19 |
| Analysis of variation | |||||
|---|---|---|---|---|---|
| Variation | s.s. | DF | MS | F Statistic | P Value |
| Between | 18.06 | 3 | 6.02 | 53.89 | < 0.001 |
| Within | 47.47 | 425 | 0.11 | Highly significant | |
| Total | 65.53 | 428 | |||
