Question
Construct histograms for following frequency distribution:
| Class Interval | 110-119 | 120-129 | 130-139 | 140-149 | 150-159 |
| Frequency | 15 | 23 | 30 | 20 | 16 |
✓
Answer
Steps:
a. Make the class intervals continuous by subtracting 0.5 from the lower limit of each class and add 0.5 to the upper limit of each class.
b. On the $x$-axis, take $1 \mathrm{~cm}$ as 5 units and plot class intervals.
c. On the $y$-axis, take $1 \mathrm{~cm}$ as 5 units and plot frequency.
d. Draw rectangles of histogram as per given data.
a. Make the class intervals continuous by subtracting 0.5 from the lower limit of each class and add 0.5 to the upper limit of each class.
b. On the $x$-axis, take $1 \mathrm{~cm}$ as 5 units and plot class intervals.
c. On the $y$-axis, take $1 \mathrm{~cm}$ as 5 units and plot frequency.
d. Draw rectangles of histogram as per given data.
| Class Interval | Frequency |
| 109.5-119.5 | 15 |
| 119.5-129.5 | 23 |
| 129.5-139.5 | 30 |
| 139.5-149.5 | 20 |
| 149.5-159.5 | 16 |
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