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Question
The marks of 24 candidates in the subject mathematics are given below:
| 45 | 48 | 15 | 23 | 30 | 35 | 40 | 11 |
| 29 | 0 | 3 | 12 | 48 | 50 | 18 | 30 |
| 15 | 30 | 11 | 42 | 23 | 2 | 3 | 44 |
The maximum marks are 50. Make a frequency distribution taking class intervals 0 - 10, 10-20, .......
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Solution
The frequency table for the given distribution is
| Marks | Tally Marks | Frequency |
| 0 - 10 | |||| | 4 |
| 10 - 20 | |||| | | 6 |
| 20 - 30 | ||| | 3 |
| 30 - 40 | |||| | 4 |
| 40 - 50 | |||| || | 7 |
In this frequency distribution, the marks 30 are in the class of interval 30 - 40 and not in 20 - 30. Similarly, marks 40 are in the class of interval 40 - 50 and not in 30 - 40.
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