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प्रश्न
Construct histograms for following frequency distribution:
| Class Mark | 15 | 25 | 35 | 45 | 50 | 55 | 60 |
| Frenuencv | 6 | 12 | 15 | 18 | 25 | 14 | 10 |
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उत्तर
Steps :
a. Make the class intervals continuous by taking class mark as midpoints.
b. On the x-axis, take 1 cm as 5 units and plot class interval.
c. On the y-axis , take 1 cm as 5 units and plot frequency.
d. Draw rectangles of histogram as per given data .
| Class Interval | Frequency |
| 0-9.5 | - |
| 9.5-19.5 | 6 |
| 19.5-29.5 | 12 |
| 29.5-39.5 | 15 |
| 39.5-47.5 | 18 |
| 47.5-52.5 | 25 |
| 52.5-57.5 | 14 |
| 57.5-62.5 | 10 |
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संबंधित प्रश्न
Draw histogram and frequency polygon on the same graph paper for the following frequency distribution
| Class | Frequency |
| 15-20 | 20 |
| 20-25 | 30 |
| 25-30 | 50 |
| 30-35 | 40 |
| 35-40 | 25 |
| 40-45 | 10 |
The histogram below represents the scores obtained by 25 students in a mathematics mental test. Use the data to:
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- To calculate mean.
- To determine the Modal class.
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| Investment (Thousand Rupees) |
10-15 | 15-20 | 20-25 | 25-30 | 30-35 |
| No. of families | 30 | 50 | 60 | 55 | 15 |
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(ii) What wages are the least number of workers getting? What is the number of such workers?
(iii) What is the total number of workers?
(iv) What is the factory size?
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| Price of sugar Per kg (in Rs) | Number of weeks |
| 28-30 | 4 |
| 30-32 | 8 |
| 32-34 | 22 |
| 34-36 | 12 |
| 36-38 | 6 |
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| No. of Students | 9 | 5 | 10 | 7 | 4 | 6 |
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