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प्रश्न
In the class interval 20 – 30, the lower class limit is ______.
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उत्तर
In the class interval 20 – 30, the lower class limit is 20.
Explanation:
The lower value of class interval (i.e., 20 here) is called lower limit and the upper value of class interval (i.e., 30 here) is called upper limit.
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If class mark is 10 and class width is 6 then find the class.
In a school, 46 students of 9th standard, were told to measure the lengths of the pencils in their compass boxes in centimeters. The data collected was as follows.
16, 15, 7, 4.5, 8.5, 5.5, 5, 6.5, 6, 10, 12, 13, 4.5, 4.9, 16, 11, 9.2, 7.3, 11.4, 12.7, 13.9, 16, 5.5, 9.9, 8.4, 11.4, 13.1, 15, 4.8, 10, 7.5, 8.5, 6.5, 7.2, 4.5, 5.7, 16, 5.7, 6.9, 8.9, 9.2, 10.2, 12.3, 13.7, 14.5, 10.
By taking inclusive classes 0-5, 5-10, 10-15.... prepare a grouped frequency distribution table.
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What is the class-mark of class 25-35?
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| 8 - 16 | 13 |
| 16 - 24 | 12 |
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| 32 - 40 | 15 |
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| Frequency | 6 | 12 | 10 | 15 | 9 | 2 |
a. The true class limits of the fifth class.
b. The size of the second class.
c. The class boundaries of the fourth class.
d. The upper and lower limits of the sixth class.
e. The class mark of the third class.
Form a continuous frequency distribution table for the marks obtained by 30 students in a X std public examination.
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Using the following frequency table.
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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 more than 8 marks is 21.
