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प्रश्न
Given below is a frequency distribution table. Read it and answer the questions that follow:
| Class Interval | Frequency |
| 10 – 20 | 5 |
| 20 – 30 | 10 |
| 30 – 40 | 4 |
| 40 – 50 | 15 |
| 50 – 60 | 12 |
- What is the lower limit of the second class interval?
- What is the upper limit of the last class interval?
- What is the frequency of the third class?
- Which interval has a frequency of 10?
- Which interval has the lowest frequency?
- What is the class size?
उत्तर
- The lower limit of second class interval (20 – 30) is 20.
- The upper limit of the last class interval (50 – 60) is 60.
- The frequency of the third class (30 – 40) is 4.
- The interval (20 – 30) has a frequency of 10.
- The interval (30 – 40) has the lowest frequency, i.e. 4.
- We know that, Class size = Upper class limit – Lower class limit
Consider first class, i.e. 10 – 20, then class size = 20 – 10 = 10
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By taking suitable classes, prepare grouped frequency distribution table.
Construct a cumulative frequency distribution table from the frequency table given below:
| Class Interval | Frequency |
| 1 - 10 | 12 |
| 11 - 20 | 18 |
| 21 - 30 | 23 |
| 31 - 40 | 15 |
| 41 - 50 | 10 |
In a certain colony, there are 50 families. The number of people in every family is given below. Draw up the frequency table.
5, 4, 5, 4, 5, 3, 3, 3, 4, 3, 4, 2, 3, 4, 2, 2, 2, 2, 4, 5, 1, 3, 2, 4, 5, 3, 3, 2, 4, 4, 2, 3, 4, 3, 4, 2, 3, 4, 5, 3, 2, 3, 2, 3, 4, 5, 3, 2, 3, 2
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328, 470, 405, 375, 298, 326, 276, 362, 410, 255, 391, 370, 455, 229, 300, 183, 283, 366, 400, 495, 215, 157, 374, 306, 280, 409, 321, 269, 398, 200
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In the class interval 26 – 33, 33 is known as ______.
The difference between the upper and lower limit of a class interval is called the ______ of the class interval.
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| Frequency | 5 | 10 | 8 | 6 | 12 | 9 |
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