PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1. The following data gives the number of residents in an area based on their age. Find the average age of the residents. (using direct method)
| Age | \(0 - 10\) | \(10 - 20\) | \(20 - 30\) | \(30 - 40\) | \(40 - 50\) | \(50 - 60\) |
| Number of residents | \(2\) | \(6\) | \(9\) | \(7\) | \(4\) | \(2\) |
Answer:
The average age \(=\)
2. Find the mean for the following frequency table: (using assumed mean method)
| Class Interval | \(100 - 120\) | \(120 - 140\) | \(140 - 160\) | \(160 - 180\) | \(180 - 200\) | \(200 - 220\) | \(220 - 240\) |
| Frequency | \(10\) | \(8\) | \(4\) | \(4\) | \(3\) | \(1\) | \(2\) |
Answer:
The mean \(=\)
(Note: Round off the answer to \(3\) decimal places.)
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