11) The following table shows 200 males classified according to social class and headache status. Do these data provide sufficient evidence to indicate that headache status and social class are homogeneous? Let a = 0.025. Headache status No headache Simple headache Migraine Total A 7 15 5 27 Social Class B 29 54 25 108 C 22 31 12 65 Total 58 100 42 200

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