Table 10: $\chi ^2$ computed for the 3 different models and colours for each of the supernovae and for their combination.
  $\chi^2_{B-V}$/d.o.f. $\chi^2_{B-I}$/d.o.f.
SN 2000fr    
no dust, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (0.25, 0.75) 2.33/4 2.08/3
dust Rv=9.5, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (1, 0) 4.24/4 3.94/3
dust Rv=4.5, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (1, 0) 5.29/4 4.50/3
SN 1999ff    
no dust, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (0.25, 0.75) 6.05/5 3.93/2
dust Rv=9.5, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (1, 0) 4.69/5 2.06/2
dust Rv=4.5, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (1, 0) 4.31/5 1.89/2
SNe combined    
no dust, $(\Omega_{\rm M},\;\Omega_\Lambda)$ = (0.25, 0.75) 8.38/9 6.01/5
dust Rv=9.5, $(\Omega_{\rm M},\Omega_\Lambda)$ = (1, 0) 8.93/9 6.00/5
dust Rv=4.5, $(\Omega_{\rm M},\Omega_\Lambda)$ = (1, 0) 9.59/9 6.39/5


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