Construct a frequency table with class-intervals 0-5 (5 not included) of the following marks obtained by a group of 30 students in an examination.
0, 5, 7, 10, 12, 15, 20, 22, 25, 27, 8, 11, 17, 3, 6, 9, 17, 19, 21, 29, 31, 35, 37, 40, 42,45, 49, 4, 50, 16.
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Solution
The frequency table with class intervals 0\[-\]5,5\[-\]15,...,50\[-\]55 is given below:
| Marks | Tally Marks | Frequency |
| 0\[-\]5 | ||| | 3 |
| 5\[-\]10 | 5 | |
| 10\[-\]15 | ||| | 3 |
| 15\[-\]20 | 5 | |
| 20\[-\]25 | ||| | 3 |
| 25\[-\]30 | ||| | 3 |
| 30\[-\]35 | | | 1 |
| 35\[-\]40 | || | 2 |
| 40\[-\]45 | || | 2 |
| 45\[-\]50 | || | 2 |
| 50\[-\]55 | | | 1 |
Concept: Organisation of Data
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