Short Answer Type
The table below shown the salaries of 280 persons:
| Salary (In thousand) | No. of Person |
| 5-10 | 49 |
| 10-15 | 133 |
| 15-20 | 63 |
| 20-25 | 15 |
| 25-30 | 6 |
| 30-35 | 7 |
| 35-40 | 4 |
| 40-45 | 2 |
| 45-50 | 1 |
Calculate the median salary of the data.
Long Answer TypeThe mean of the following distribution is 18. Find the frequency f of the class 19-21.
| Class | 11-13 | 13-15 | 15-17 | 17-19 | 19-21 | 21-23 | 23-25 |
| Frequency | 3 | 6 | 9 | 13 | f | 5 | 4 |
The following distribution gives the daily income of 50 workers of a factory:
| Daily Income (In) | 100-120 | 120-140 | 140-160 | 160-180 | 180-200 |
| Number of workers | 12 | 14 | 8 | 6 | 10 |
Convert the distribution above to a less than type cumulative frequency distribution and draw its ogive.
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