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Question
Given below is a cumulative frequency distribution table showing the ages of people living in a locality:
| Ace in years | No. of persons |
| Above 108 | 0 |
| Above 96 | 1 |
| Above 84 | 3 |
| Above 72 | 5 |
| Above 60 | 20 |
| Above 48 | 158 |
| Above 36 | 427 |
| Above 24 | 809 |
| Above 12 | 1026 |
| Above 0 | 1124 |
Prepare a frequency distribution table
Solution
| Age (in years) | No. of persons | Class interval | Frequency |
| Above 0 | 1124 | 0-12 | 1124-1026=98 |
| Above 12 | 1026 | 12-24 | 217 |
| Above 24 | 809 | 24-36 | 382 |
| Above 36 | 427 | 36-48 | 269 |
| Above 48 | 158 | 48-60 | 138 |
| Above 60 | 20 | 60-72 | 15 |
| Above 72 | 5 | 72-84 | 5-3=2 |
| Above 84 | 3 | 84-96 | 3-1=2 |
| Above 96 | 1 | 96-108 | 1-0=1 |
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0 1 2 2 1 2 3 1 3 0
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| 1 | 6 | 2 | 3 | 5 | 12 | 5 | 8 | 4 | 8 |
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The difference between the highest and lowest values of the observations is called
The number of times a particular item occurs in a given data is called its
Tallys are usually marked in a bunch of
The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The upper class-limit of the highest class is ______.
Prepare a continuous grouped frequency distribution from the following data:
| Mid-point | Frequency |
| 5 | 4 |
| 15 | 8 |
| 25 | 13 |
| 35 | 12 |
| 45 | 6 |
Also find the size of class intervals.
