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प्रश्न
When the number of observations is large, the observations are usually organised in groups of equal width called ______.
उत्तर
When the number of observations is large, the observations are usually organised in groups of equal width called class intervals.
Explanation:
Class interval is the size of each class into which a range of a variable is divided.
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संबंधित प्रश्न
Organise the following marks in a class assessment, in a tabular form.
4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7
- Which number is the highest?
- Which number is the lowest?
- What is the range of the data?
- Find the arithmetic mean.
A die was thrown 25 times and following scores were obtained:
| 1, | 5, | 2, | 4, | 3, | 6, | 1, | 4, | 2, | 5, | 1, | 6, | 2, |
| 6, | 3, | 5, | 4, | 1, | 3, | 2, | 3, | 6, | 1, | 5, | 2, |
Prepare a frequency table of the scores.
Construct a frequency distribution table for the following marks obtained by 25 students in a history test in class VIII of a school:
9, 17, 12, 20, 9, 18, 25, 17, 19, 9, 12, 9, 12, 18, 17, 19, 20, 25, 9, 12, 17, 19, 19, 20, 9
(i) What is the range of marks?
(ii) What is the highest mark?
(iii) Which mark is occurring more frequently?
The data that can take values between a certain range is called ________
Viji threw a die 30 times and noted down the result each time as follows. Prepare a table on the numbers shown using Tally Marks.
| 1 | 4 | 3 | 5 | 5 | 6 | 6 | 4 | 3 | 5 | 4 | 5 | 6 | 5 | 2 |
| 4 | 2 | 6 | 5 | 5 | 6 | 6 | 4 | 5 | 6 | 6 | 5 | 4 | 1 | 1 |
The following list tells colours liked by 25 students. Prepare a table using Tally Marks.
| Red | Blue | White | Grey | White |
| Green | Grey | Blue | Green | Grey |
| Blue | Grey | Red | Green | Red |
| Blue | Blue | Green | Blue | Green |
| Grey | Grey | Green | Grey | Red |
The following are the marks obtained by 30 students in a class test out of 20 in Mathematics subject.
| 11 | 12 | 13 | 12 | 12 | 15 | 16 | 17 | 18 | 12 |
| 20 | 13 | 13 | 14 | 14 | 14 | 15 | 15 | 15 | 15 |
| 16 | 16 | 16 | 15 | 14 | 13 | 12 | 11 | 19 | 17 |
Prepare a table using Tally Marks
Following are the choices of games of 40 students of Class VI:
football, cricket, football, kho-kho, hockey, cricket, hockey, kho-kho, tennis, tennis, cricket, football, football, hockey, kho-kho, football, cricket, tennis, football, hockey, kho-kho, football, cricket, cricket, football, hockey, kho-kho, tennis, football, hockey, cricket, football, hockey, cricket, football, kho-kho, football, cricket, hockey, football.
(a) Arrange the choices of games in a table using tally marks.
(b) Which game is liked by most of the students?
(c) Which game is liked by minimum number of students?
Fill in the blanks in the following table which represents shirt size of 40 students of a school.
| Shirt size | Tally Marks | Number of students |
| 30 | ||| | 3 |
| 32 | `cancel(bb|bb|bb|bb|)` | ______ |
| 34 | ______ | 8 |
| 36 | `cancel(bb|bb|bb|bb|)` || | ______ |
| 38 | `cancel(bb|bb|bb|bb|)` ______ | 10 |
| 40 | ______ | 7 |
In a Mathematics test, the following marks were obtained by 40 students. Arrange these marks in a table using tally marks.
| 8 | 1 | 3 | 7 | 6 | 5 | 5 | 4 | 4 | 2 |
| 4 | 9 | 5 | 3 | 7 | 1 | 6 | 5 | 2 | 7 |
| 7 | 3 | 8 | 4 | 2 | 8 | 9 | 5 | 8 | 6 |
| 7 | 4 | 5 | 6 | 9 | 6 | 4 | 4 | 6 | 6 |
How many students obtained marks below 4?
