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Question
Draw a histogram for the daily earnings of 30 drug stores in the following table:
| Daily earnings (in Rs): | 450−500 | 500−550 | 550−600 | 600−650 | 650−700 |
| Numbers of stores: | 16 | 10 | 7 | 3 | 1 |
Solution
The class limits are represented along the x-axis and the frequencies along the y-axis on a suitable scale. Taking class intervals as bases and the corresponding frequencies as heights, the rectangles can be drawn to obtain the histogram of the given frequency distribution. The histogram is given below:
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The marks scored by students in Mathematics in a certain Examination are given below:
| Marks Scored | Number of Students |
| 0 — 20 | 3 |
| 20 — 40 | 8 |
| 40 — 60 | 19 |
| 60 — 80 | 18 |
| 80 — 100 | 6 |
Draw histogram for the above data.
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| Frequency | 12 | 20 | 26 | 18 | 10 | 6 |
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| Class Interval | 10 – 16 | 16 – 22 | 22 – 28 | 28 – 34 | 34 – 40 |
| Frequency | 15 | 23 | 30 | 20 | 16 |
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| Frequency | 24 | 16 | 09 | 15 | 20 |
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- Write the classes having zero frequency.
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The following table shows the investment made by some families. Show
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| Variate | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
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| Frequency | 8 | 12 | 15 | 18 | 25 | 7 |
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| Class Interval | 1-10 | 11-20 | 21-30 | 31-40 | 41-50 |
| Frequency | 11 | 23 | 30 | 20 | 16 |
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| 28-30 | 4 |
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| 52 | 33 | 56 | 52 | 44 | 59 | 47 | 61 | 49 | 61 |
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| 08 | 71 | 30 | 18 | 43 | 28 | 20 | 40 | 58 | 49 |
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| No. of persons | 15 | 8 | 12 | 17 | 9 | 10 | 6 |
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| 30 – 40 | 45 |
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| 60 – 70 | 51 |
| 70 – 80 | 35 |
Use graph sheet for this question.
Take 2 cm = 10 overs along one axis and 2 cm = 10 runs along the other axis.
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