Table 1: Critical values of $\chi ^2$ for 3 probability levels.
$n_i -\nu$ $\chi^2_{\rm crit} (P_0=0.05)$ $\chi^2_{\rm crit} (P_0=0.1)$ $\chi^2_{\rm crit} (P_0=0.2)$

1 3.841 2.706 1.642

2 5.991 4.605 3.219

3 7.815 6.251 4.642

4 9.488 7.779 5.989

5 11.070 9.236 7.289

**Table 1:** Critical values of $\chi ^2$ for 3 probability levels.
$n_i -\nu$	$\chi^2_{\rm crit} (P_0=0.05)$	$\chi^2_{\rm crit} (P_0=0.1)$	$\chi^2_{\rm crit} (P_0=0.2)$
1	3.841	2.706	1.642
2	5.991	4.605	3.219
3	7.815	6.251	4.642
4	9.488	7.779	5.989
5	11.070	9.236	7.289

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