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Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.

Answer :

Arrangement of data in a table using tally marks is done as :

- 1.For which of these would you use a histogram to show the data? (a) The number of letters for different areas in a postman’s bag. (b) The height of competitors in an athletics meet. (c) The number of cassettes produced by 5 companies. (d) The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m.. at a station. Give reasons for each.
- 3.The weekly wages (in ?) of 30 workers in a factory are : 830, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 835, 836, 878, 840, 868, 890, 806,840. Using tally marks make a frequency table with intervals as 800-810, 810-820 and so on.
- 4.Draw a histogram for the frequency table made for the data in Question 3, and answer the following questions: (i) Which group has the maximum number of workers? (ii) How many workers earn ₹ 850 and more? (iii) How many workers earn less than ₹ 850?
- 5.The number of hours for which students of a particular class watched television during holidays is shown through the given graph. Answer the following questions. (i) For how many hours did the maximum number of students watch TV? (ii) How many students watched TV for less than 4 hours? (iii) How many students spent more than 5 hours watching TV?

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