create a relative frequency distribution Age:16-18,20-29,30-39,49-49,50-59,60-69,70-79,80-89 Drivers: 9.2,33.6,40.8,37,24.2,17.5,12.7,4.3 (100 total)

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Frequency of the class divided by total frequency of all classes is called relative frequency .Here sum of all frequencies=100

Class interval        frequency        Relative frequency

16-18                      9.2               .092

20-29                     33.6              .336

30-39                     40.8              .408

49-49                     37                 .37

50-59                    24.2               .242

60-69                    17.5               .175

70-79                    12.7               .127

80-89                      4.3               .043

                          ---------------------------

                           100                  1.000 

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