In: Statistics and Probability
The table below shows whether a random collection of people will respond to a survey or not, in different age groups. Test the claim that cooperation of a subject and the age of a subject are independent. χ2R = 15.086
Age |
18-21 |
22-29 |
30-39 |
40-49 |
50-59 |
60 and over |
responded |
73 |
255 |
245 |
136 |
138 |
202 |
refused |
11 |
20 |
33 |
16 |
27 |
49 |
Critical Values: z0.005 = 2.575, z0.01 = 2.325, z0.025 = 1.96, z0.05 = 1.645
When d.f.=6: t0.005 = 3.707, t0.01 = 3.143, t0.025 = 2.447, t0.05 = 1.943
When d.f.=9: t0.005 = 3.250, t0.01 = 2.821, t0.025 = 2.262, t0.05 = 1.833
When d.f.=44: t0.005 = 2.690, t0.01 = 2.412, t0.025 = 2.014, t0.05 = 1.679
When d.f.=100: t0.005 = 2.625, t0.01 = 2.364, t0.025 = 1.984, t0.05 = 1.660