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Question
The marks obtained by 40 students of class VIII in an examination are given below:
16, 17, 18, 3, 7, 23, 18, 13, 10, 21, 7, 1, 13, 21, 13, 15, 19, 24, 16, 3, 23, 5, 12, 18, 8, 12, 6, 8, 16, 5, 3, 5, 0, 7, 9, 12, 20, 10, 2, 23.
Divide the data into five groups, namely 0-5, 5-10, 10-15, 15-20 and 20-25 and prepare a grouped frequency table.
Solution
The frequency table for the marks of 40 students of class VIII in an examination is given below:
| Range of Marks | Tally Marks | Frequency |
| 0\[-\]5 | 9 | |
| 5\[-\]10 | 9 | |
| 10\[-\]15 | 7 | |
| 15\[-\]20 | 9 | |
| 20\[-\]25 | 6 |
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RELATED QUESTIONS
Define the following term:
Grouped frequency distribution
Define the following term:
Class-interval
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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
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(iii) Which mark is occurring more frequently?
The following is the distribution of weights (in kg) of 52 persons:
| Weight in kg | Persons |
| 30-40 | 10 |
| 40-50 | 15 |
| 50-60 | 17 |
| 60-70 | 6 |
| 70-80 | 4 |
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(ii) What is the range of the above weights?
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Construct a frequency table with class-intervals 0-5 (5 not included) of the following marks obtained by a group of 30 students in an examination.
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When the number of observations is large, the observations are usually organised in groups of equal width called ______.
The data can be arranged in a tabular form using ______ marks.
The number of two wheelers owned individually by each of 50 families are listed below. Make a table using tally marks.
1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 0, 1, 1, 2, 3, 1, 2, 1, 1, 2, 1, 2, 3, 1, 0, 2, 1, 0, 2, 1, 2, 1, 2, 1, 1, 4, 1, 3, 1, 1, 2, 1, 1, 1, 1, 2, 3, 2, 1, 1
Find the number of families having two or more, two wheelers.
