OPOSSEM OPOSSEM

The following table consists of critical values of the chi-square (χ²) distribution for selected confidence levels (90%, 95%, and 99%) between 1 and 100 degrees of freedom. To use this table, identify the column with the appropriate confidence level and then find the row with the number of degrees of freedom appropriate for the statistical test; for example, in the chi-square test of association for two-way tables, <math>\text{df} = (r-1)\times(c-1)</math> where r and c are the number of rows and columns in the table, respectively.

df	90%	95%	99%
1	2.706	3.841	6.635
2	4.605	5.991	9.210
3	6.251	7.815	11.345
4	7.779	9.488	13.277
5	9.236	11.070	15.086
6	10.645	12.592	16.812
7	12.017	14.067	18.475
8	13.362	15.507	20.090
9	14.684	16.919	21.666
10	15.987	18.307	23.209
11	17.275	19.675	24.725
12	18.549	21.026	26.217
13	19.812	22.362	27.688
14	21.064	23.685	29.141
15	22.307	24.996	30.578
16	23.542	26.296	32.000
17	24.769	27.587	33.409
18	25.989	28.869	34.805
19	27.204	30.144	36.191
20	28.412	31.410	37.566
21	29.615	32.671	38.932
22	30.813	33.924	40.289
23	32.007	35.172	41.638
24	33.196	36.415	42.980
25	34.382	37.652	44.314
26	35.563	38.885	45.642
27	36.741	40.113	46.963
28	37.916	41.337	48.278
29	39.087	42.557	49.588
30	40.256	43.773	50.892
31	41.422	44.985	52.191
32	42.585	46.194	53.486
33	43.745	47.400	54.776
34	44.903	48.602	56.061
35	46.059	49.802	57.342
36	47.212	50.998	58.619
37	48.363	52.192	59.893
38	49.513	53.384	61.162
39	50.660	54.572	62.428
40	51.805	55.758	63.691
41	52.949	56.942	64.950
42	54.090	58.124	66.206
43	55.230	59.304	67.459
44	56.369	60.481	68.710
45	57.505	61.656	69.957
46	58.641	62.830	71.201
47	59.774	64.001	72.443
48	60.907	65.171	73.683
49	62.038	66.339	74.919
50	63.167	67.505	76.154
51	64.295	68.669	77.386
52	65.422	69.832	78.616
53	66.548	70.993	79.843
54	67.673	72.153	81.069
55	68.796	73.311	82.292
56	69.919	74.468	83.513
57	71.040	75.624	84.733
58	72.160	76.778	85.950
59	73.279	77.931	87.166
60	74.397	79.082	88.379
61	75.514	80.232	89.591
62	76.630	81.381	90.802
63	77.745	82.529	92.010
64	78.860	83.675	93.217
65	79.973	84.821	94.422
66	81.085	85.965	95.626
67	82.197	87.108	96.828
68	83.308	88.250	98.028
69	84.418	89.391	99.228
70	85.527	90.531	100.425
71	86.635	91.670	101.621
72	87.743	92.808	102.816
73	88.850	93.945	104.010
74	89.956	95.081	105.202
75	91.061	96.217	106.393
76	92.166	97.351	107.583
77	93.270	98.484	108.771
78	94.374	99.617	109.958
79	95.476	100.749	111.144
80	96.578	101.879	112.329
81	97.680	103.010	113.512
82	98.780	104.139	114.695
83	99.880	105.267	115.876
84	100.980	106.395	117.057
85	102.079	107.522	118.236
86	103.177	108.648	119.414
87	104.275	109.773	120.591
88	105.372	110.898	121.767
89	106.469	112.022	122.942
90	107.565	113.145	124.116
91	108.661	114.268	125.289
92	109.756	115.390	126.462
93	110.850	116.511	127.633
94	111.944	117.632	128.803
95	113.038	118.752	129.973
96	114.131	119.871	131.141
97	115.223	120.990	132.309
98	116.315	122.108	133.476
99	117.407	123.225	134.642
100	118.498	124.342	135.807