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Question
The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G). The following list gives the shoppers who came during the first hour in the morning
W W W G B W W M G G M M W W W W G B M W B G G M W W M M W W W M W B W G M W W W W G W M M W W M W G W M G W M M B G G W
Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.
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Solution
By observing the data given above, we can make a frequency distribution table as follows.
| Shopper | Tally marks | Number |
| W |  |
28 |
| M |  |
15 |
| B |  |
5 |
| G |  |
12 |
The bar graph of this data can be drawn as follows.
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Draw the frequency polygon for the following frequency distribution
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| 30 — 35 | 8 |
| 35 — 40 | 12 |
| 40 — 45 | 10 |
| 45 — 50 | 7 |
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| No. of Students | 4 | 8 | 14 | 19 | 5 |
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10-15 | 15-20 | 20-25 | 25-30 | 30-35 |
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| 60 - 80 | 16 |
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Draw histogram for the above data.
The time taken, in seconds, to solve a problem for each of 25 persons is as follows:
| 16 | 20 | 26 | 27 | 28 |
| 30 | 33 | 37 | 38 | 40 |
| 42 | 43 | 46 | 46 | 47 |
| 48 | 49 | 50 | 53 | 58 |
| 59 | 60 | 64 | 52 | 20 |
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| Weekly pocket money (₹) | No. of student |
| 40 - 50 | 2 |
| 59 - 60 | 8 |
| 60 - 70 | 12 |
| 70 - 80 | 14 |
| 80 - 90 | 8 |
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| 5 - 10 | 14 |
| 10 - 15 | 28 |
| 15 - 20 | 42 |
| 20 - 25 | 50 |
| 25 - 30 | 30 |
| 30 - 35 | 14 |
| 35 - 40 | 12 |
Draw a histogram representing the above distribution and estimate the mode from the graph.
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| Under 35 | 38 |
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| Under 45 | 48 |
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| No. of Workers | 6 | 12 | 20 | 15 | 9 |
