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1. Calculate the mean of the following distribution using Assumed Mean Method:
| Class Interval | \(0 - 10\) | \(10 - 20\) | \(20 - 30\) | \(30 - 40\) | \(40 - 50\) |
| Frequency | \(5\) | \(7\) | \(15\) | \(28\) | \(8\) |
Answer:
Mean \(=\)
2. Find the arithmetic mean of the following data using Step Deviation Method:
| Age | \(15 - 19\) | \(20 - 24\) | \(25 - 29\) | \(30 - 34\) | \(35 - 39\) | \(40 - 44\) |
| No. of persons | \(4\) | \(20\) | \(38\) | \(24\) | \(10\) | \(9\) |
Answer:
Mean \(=\)
(Note: Round off the answers to \(2\) decimal places.)
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