Present the following data by histograms.
| Daily wages (in `) | No. of workers |
| 22.50 | 6 |
| 27.50 | 9 |
| 32.50 | 13 |
| 37.50 | 7 |
| 42.50 | 9 |
| 47.50 | 5 |
| 52.50 | 3 |
| Total | 52 |
The difference between two class marks is
x = 27.50 - 22.50 = 5.00
The value of
=
= 2.50
Lower and upper limits for 22.50 will be
22.50 - 2.50 = 20.00 and 22.50 + 2.50 = 25.00
... First class interval 20.00 - 25.00
Similarly we can calculate other class intervals,
The histogram of the above table is:
x = 27.50 - 22.50 = 5.00
The value of
== 2.50Lower and upper limits for 22.50 will be
22.50 - 2.50 = 20.00 and 22.50 + 2.50 = 25.00
... First class interval 20.00 - 25.00
Similarly we can calculate other class intervals,
| Daily wages | 20-25 | 25-30 | 30-35 | 35-40 | 40-45 | 45-50 | 50-55 |
| No. of workers | 6 | 9 | 13 | 7 | 9 | 5 | 3 |
The histogram of the above table is:
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