Table 6

Analysis of variance for the accident and emergency unit data

Source of variation

Degrees of freedom

Sum of squares

Mean square

F

P

Regression

1

1.462

1.462

11.24

0.004

Residual

18

2.342

0.130

Total

19

3.804

Bewick et al. Critical Care 2003 7:451   doi:10.1186/cc2401