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प्रश्न
Construct a frequency distribution table for the numbers given below, using the class intervals 21-30, 31-40, ... etc.
75, 65, 57, 26, 33, 44, 58, 67, 75, 78, 43, 41, 31, 21, 32, 40, 62, 54, 69, 48, 47, 51, 38, 39, 43, 61, 63, 68, 53, 56, 49, 59, 37, 40, 68, 23, 28, 36 and 47.
Use the table obtained to draw:
- a histrogram
- an ogive
तक्ता
आलेख
बेरीज
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उत्तर
| Class Interval | Tally | Frequency | c.f. |
| 21 – 30 | |||| | 4 | 4 |
| 31 – 40 | |||| |||| | 9 | 13 |
| 41 – 50 | |||| |||| | 9 | 22 |
| 51 – 60 | |||| || | 7 | 29 |
| 61 – 70 | |||| ||| | 8 | 37 |
| 71 – 80 | ||| | 3 | 40 |
Plot the points (30, 4), (40, 13), (50, 22), (60, 29), (70, 37) and (80, 40) on the graph and join them with free hand to obtain an ogive.
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