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Question
Explain the meaning of the term Class-mark.
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Solution
Class mark: The middle value of the class is called as the class mark.
Class mark`="(Upper Limit + Lower Limit)"/2`
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RELATED QUESTIONS
Explain the meaning of the term Class-integral.
Explain the meaning of the term Class-size.
Explain the meaning of the term Frequency.
A survey regarding the heights (in cm) of 50 girls of a class was conducted and the following data was obtained:
| Height in cm |
120 – 130 | 130 – 140 | 140 – 150 | 150 – 160 | 160 – 170 |
| No. of girls |
2 | 8 | 12 | 20 | 8 |
Find the mean, median and mode of the above data.
In a class test, 50 students obtained marks as follows:
| Marks obtained | 0 – 20 | 20 – 40 | 40 – 60 | 60 – 80 | 80 – 100 |
| Number of Students | 4 | 6 | 25 | 10 | 5 |
In a class test, 50 students obtained marks as follows:
Define primary data and secondary data.
Explain the meaning of the following terms: Variate
Explain the meaning of the following terms: Class mark
Explain the meaning of the following terms: True Class Limits
Explain the meaning of the following terms: Frequency
