CBSE Class 11-commerce Answered
Calculate arithmetic mean for the following data in direct method
Class interval frequency
0-2. 2
2-4. 4
4-6. 6
6-8 . 8
8-10 . 10
Asked by ramyasridhar82 | 17 Feb, 2019, 02:48: PM
Expert Answer
| class interval | mid-value (m) |
frequency (f) |
f *m (fm) |
| 0-2 | 1 | 2 | 2 |
| 2-4 | 3 | 4 | 12 |
| 4-6 | 5 | 6 | 30 |
| 6-8 | 7 | 8 | 56 |
| 8-10 | 9 | 10 | 90 |
| ∑f = 30 | ∑fm = 190 |
Arithmetic mean = 6.33
Answered by Christina | 18 Feb, 2019, 12:27: PM
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