Chapter 5: Data Handling

Exercise 5.1

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.
Solution: (a) The number of letters for different areas in a postman’s bag . In this case , the data can not be divided into class interval .
(b) The height of competitors in an athletics meet . In this case , the data can be divided into class interval .
(c) The number of cassettes produced by 5 companies. In this case , the data can not be divided into class interval .
(d) The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m. at a station. In this case , the data can be divided into class interval .

2. The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G). The following list gives the shoppers who came during the first hour in the morning:
W W W G B W W M G G M M W W W W G B M W B G G M W W M M W W
W M W B W G M W W W W G W M M W W M W G W M G W M M B G G W
Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.