Time alloted for the preparation of an examination by some students is shown in the table. Draw a histogram to show the information.
| Time (minutes) | 60–80 | 80–100 | 100–120 | 120–140 | 140–160 |
|---|---|---|---|---|---|
| No. of students | 14 | 20 | 24 | 22 | 16 |
Answer: Histogram with rectangles of heights 14, 20, 24, 22, 16 on the classes 60–80, 80–100, 100–120, 120–140, 140–160
| Time (minutes) | No. of students |
|---|---|
| 60–80 | 14 |
| 80–100 | 20 |
| 100–120 | 24 |
| 120–140 | 22 |
| 140–160 | 16 |
Steps: Take time (minutes) on the X-axis and no. of students on the Y-axis, with a convenient scale on each. Since the first class does not start at 0, show a kink mark between the origin and the first class. On each class interval draw a rectangle whose height equals its frequency; adjacent rectangles touch each other (no gaps). The tallest rectangle is for the class 100–120 (frequency 24).
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