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Question
In a school, 46 students of 9th standard, were told to measure the lengths of the pencils in their compass boxes in centimeters. The data collected was as follows.
16, 15, 7, 4.5, 8.5, 5.5, 5, 6.5, 6, 10, 12, 13, 4.5, 4.9, 16, 11, 9.2, 7.3, 11.4, 12.7, 13.9, 16, 5.5, 9.9, 8.4, 11.4, 13.1, 15, 4.8, 10, 7.5, 8.5, 6.5, 7.2, 4.5, 5.7, 16, 5.7, 6.9, 8.9, 9.2, 10.2, 12.3, 13.7, 14.5, 10.
By taking inclusive classes 0-5, 5-10, 10-15.... prepare a grouped frequency distribution table.
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Solution
| Class Interval | Tally Marks | Frequency |
| 0 - 5 | `cancel(bb|bb|bb|bb|)` | 5 |
| 5 - 10 | `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` | 20 |
| 10 - 15 | `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` | 15 |
| 15 - 20 | `cancel(bb|bb|bb|bb|)` `bb|` | 6 |
| Total | 46 |
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