Table 3.
Chi-square goodness-of-fit test showing the strain dependency of the proportion of spindles with > one bag2 fibre. Strains have been grouped to ensure that the expected number of spindles was at least five, the minimum required by the criteria for this test. Expected numbers equal the total number of spindles for the strain (or grouped strains) multiplied by the overall number observed with > one b2 fibres and divided by the overall total number of spindles
| Strain | Total no.of spindles | No. of spindles with > one b2 fibres |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Observed | Proportion | Expected | (o − e)2/e | ||||||
| C57BL/6J and BEH | 54 | 5 | 0.09 | 11.6 | 3.75 | ||||
| SM/J | 31 | 5 | 0.16 | 6.7 | 0.41 | ||||
| BEL | 39 | 12 | 0.31 | 8.4 | 1.57 | ||||
| DUH and LG/J | 39 | 13 | 0.33 | 8.4 | 2.55 | ||||
| Overall | 163 | 35 | 0.21 | χ2 | 8.29 | P < 0.05 for 2 df | |||