Illustration 8.7. Present the data of Table 8.8 by a suitable histo- gram. TABLE 8.8. AVERAGE MONTHLY EARNING OF 1035 EMPLOYEES IN CONSTRUCTION INDUSTRY Monthly earnings Number of Frequency density of Workers (per Rs 10 of earning) workers 60-70 25 25 70-80 100 100 80-90 150 150 90-100 200 200 100-120 240 120 120-140 160 80 140-150 50 50 150-180 90 30 180 or more 20 -

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