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Question
The following are the marks obtained by 30 students in an examination.
| 15 | 20 | 8 | 9 | 10 |
| 16 | 17 | 20 | 24 | 30 |
| 44 | 47 | 38 | 36 | 40 |
| 27 | 25 | 28 | 30 | 19 |
| 7 | 11 | 21 | 31 | 41 |
| 37 | 47 | 23 | 20 | 17 |
Taking class intervals 0-10, 10-20, ……… 40-50 ; construct a frequency table.
Sum
Solution
| Class Intervals | Tally Marks | Frequency |
| 0-10 | ||| | 3 |
| 10-20 | |||| || | 7 |
| 20-30 | |||| |||| | 9 |
| 30-40 | |||| | | 6 |
| 40-50 |
|||| |
5 |
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Constructing a Frequency Table
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| 11.5 | 6.3 | 7.8 | 9.2 | 10.5 |
| 4.5 | 6 | 8.3 | 12.5 | 15.8 |
| 7.4 | 5.3 | 8.4 | 15.2 | 8.9 |
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| 15.5 | 14.4 | 12.2 | 7.7 | 5.5 |
