The relative frequency of the fifth class is 0 029 00 265 0 147 O 0 206 The cumulative frequency of the first class is O 13 05 02 0 3 0 10 10 20 20 30 30 40 40 50 S 297 12 1 The percentage of students who work less than 40 hours per week is O 76 5 O 100 O 14 7 O97 1 he data in the table are considered O grouped quantitative O discrete qualitative Ogrouped qualitative