Table 6 Tests of parallelism between the probit-log(dose) regression lines calculated using the ML procedure (Excel), Polo-Plus and SPSS
From: Comparing lethal dose ratios using probit regression with arbitrary slopes
| Comparison | Excel | Polo-Plus | SPSS2a | |||
|---|---|---|---|---|---|---|
| z | Parallelism | χ 2 ( d.f. = 1) | Parallelism | χ 2 ( d.f. = 1) | Parallelism | |
| Rotenone vs Deguelin | 2.844 | Rejected | 8.41 | Rejected | 10.216 | Rejected |
| Rotenone vs Mixture | 3.049 | Rejected | 9.68 | Rejected | 9.284 | Rejected |
| Fairfax vs Scheafer | 0.475 | Accepted | 0.23 | Accepted | 0.000 | Accepted |
| Fairfax vs Pixley | 0.720 | Accepted | 0.36 | Accepted | 0.598 | Accepted |
| BugRes vs BugLab | 3.821 | Rejected | 22.10 | Rejected | 24.840 | Rejected |