A study of people who refused to answer survey questions provided the randomly selected sample data in the accompanying table. At the 0.01 significance level, test the claim that the cooperation of the subject (response, refusal) is independent of the age category. Does any particular age group appear to be particularly uncooperative?

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Age 18-21 22-29 30-39 40-49 S0-59 60 and over Responded Refused 255 20 245 136 16 202 49 73 138 27 Based on data from "I Hear You Knocking But You Can't Come In," by Fitzgerald and Fuller, Sociological Methods and Research, Vol. 11, No. 1