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Question
The height of 30 children in a class is given in centimetres. Draw up a frequency table of this data.
131, 135, 140, 138, 132, 133, 135, 133, 134, 135, 132, 133, 140, 139, 132, 131, 134, 133, 140, 140, 139, 136, 137, 136, 139, 137, 133, 134, 131, 140
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Solution
| Height | Tally Marks | Children |
| 131 | `bb|bb|bb|` | 3 |
| 132 | `bb|bb|bb|` | 3 |
| 133 | `cancel(bb|bb|bb|bb|)` | 5 |
| 134 | `bb|bb|bb|` | 3 |
| 135 | `bb|bb|bb|` | 3 |
| 136 | `bb|bb|` | 2 |
| 137 | `bb|bb|` | 2 |
| 138 | `bb|` | 1 |
| 139 | `bb|bb|bb|` | 3 |
| 140 | `cancel(bb|bb|bb|bb|)` | 5 |
| Total | 30 |
RELATED QUESTIONS
Find the class-mark of the class 35 - 40.
What is the class-mark of class 25-35?
If the classes are 0-10, 10-20, 20-30... then in which class should the observation 10 be included?
The value of π up to 50 decimal place is
3.14159265358979323846264338327950288419716939937510
(i) Make a frequency distribution table of digits from 0 to 9 after the decimal place.
(ii) Which are the most and least occurring digits?
Construct a frequency table from the following data:
| Marks | No. of students |
| less than 10 | 6 |
| less than 20 | 15 |
| less than 30 | 30 |
| less than 40 | 39 |
| less than 50 | 53 |
| less than 60 | 70 |
Construct a frequency distribution table from the following cumulative frequency distribution:
| Class Interval | Cumulative Frequency |
| 10 - 19 | 8 |
| 20 - 29 | 19 |
| 30- 39 | 23 |
| 40- 49 | 30 |
The number of times a particular observation occurs in a given data is called its ______.
The class size of the interval 80 – 85 is ______.
Using the following frequency table.
| Marks (obtained out of 10) | 4 | 5 | 7 | 8 | 9 | 10 |
| Frequency | 5 | 10 | 8 | 6 | 12 | 9 |
The frequency of less than 8 marks is 29.
Complete the following table:
| Weights (in kg.) |
Tally Marks | Frequency (Number of persons) |
| 40 – 50 | `\cancel(bb|bb|bb|bb|) \cancel(bb|bb|bb|bb|) bb|bb|` | |
| 50 – 60 | `\cancel(bb|bb|bb|bb|) \cancel(bb|bb|bb|bb|) bb|bb|bb|bb|` | |
| 60 – 70 | `\cancel(bb|bb|bb|bb|) bb|` | |
| 70 – 80 | `bb|bb|` | |
| 80 – 90 | `bb|` |
Find the total number of persons whose weights are given in the above table.
