Table 4.
Analysis of variance of mean accuracy rates for a four-factor experiment
| Source | SS | df | MS | F | p |
|---|---|---|---|---|---|
| Method |
28.015 |
2 |
14.008 |
0.488 |
0.620 |
| Pre-processing |
0.967 |
3 |
0.322 |
0.011 |
0.998 |
| Virus |
44.815 |
1 |
44.815 |
1.560 |
0.224 |
| Outcome |
927.169 |
1 |
927.169 |
32.279 |
0.000 (*) |
| Method.Outcome |
2909.082 |
2 |
1454.541 |
50.640 |
0.000 (*) |
| Method.Pre-processing |
0.863 |
6 |
0.144 |
0.005 |
1.000 |
| Method.Virus |
42.649 |
2 |
21.324 |
0.742 |
0.487 |
| Pre-processing.Outcome |
8.436 |
3 |
2.812 |
0.098 |
0.960 |
| Virus.Outcome |
922.604 |
1 |
922.604 |
32.120 |
0.000 (*) |
| Pre-processing.Virus | 0.301 | 2 | 0.100 | 0.003 | 1.000 |
The experiment examines interactions affecting the prediction of HBSA and HepC immunoassay outcome.
(*) = Significant at 0.001 level.
Method = basic single, basic multiple, majority multiple or clear negative.
Pre-processing = none, log, scale, or scale-log.
Virus = Hepatitis B or Hepatitis C.
Outcome = positive or negative.
Method.Outcome = the interaction between method and outcome; other interactions between pairs of variables to be interpreted similarly.