Adults 21 and older volunteer from one to nine hours each week at a center for disabled senior citizens. The program recruits adult community college students, four-year college students, and nonstudents. The table below lists a sample of the volunteers, their number of hours per week, and the volunteer type. Comm. College Four-Year Students College Nonstudents 13 hours 109 115 117 46 hours 82 123 138 79 hours 34 28 47 Is the type of volunteer and the number of hours volunteered independent at the 0.05 level of significance?
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