The distances (in km) travelled daily by 50 cyclists for practice are shown below. The class widths are unequal and the classes are discontinuous.
Distance travelled (km) | Number of cyclists
0–4 | 6
5–9 | 11
10–14 | 17
15–21 | 12
22–28 | 4
Work through the tasks that follow.
(i) Convert the given distribution into continuous class intervals.
(ii) Using a suitable scale, draw a histogram for the adjusted data on graph paper.
(iii) From your histogram, identify the modal class and state its class boundaries.