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प्रश्न
Explain the meaning of the term Class-mark.
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उत्तर
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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संबंधित प्रश्न
What is primary data?
Which of the two – the primary or the secondary data – is more reliable and why?
Explain the meaning of the term True class limits.
Find the mean, median and mode of the following data:
| Class | 0 – 10 | 10 – 20 | 20 – 30 | 30 – 40 | 40 – 50 | 50 – 60 | 60 – 70 |
| Frequency | 4 | 4 | 7 | 10 | 12 | 8 | 5 |
Find the mean, median and mode of the following data.
| Class | 0 – 20 | 20 – 40 | 40 – 60 | 60 – 80 | 80 – 100 | 100 – 120 | 120 – 140 |
| Frequency | 6 | 8 | 10 | 12 | 6 | 5 | 3 |
In the following data, find the values of p and q. Also, find the median class and modal class.
| Class | Frequency (f) | Cumulative frequency (cf) |
| 100 – 200 | 11 | 11 |
| 200 – 300 | 12 | p |
| 300 – 400 | 10 | 33 |
| 400 – 500 | q | 46 |
| 500 – 600 | 20 | 66 |
| 600 – 700 | 14 | 80 |
Which of the following is not a measure of central tendency?
Define primary data and secondary data.
Find the range of given data: 46, 35, 78, 90, 20, 56, 45, 76.
The monthly pocket money of ten friends is given below:
₹ 80, ₹ 65, ₹ 35, ₹ 65, ₹ 50, ₹ 30, ₹ 60, ₹ 35, ₹ 65, ₹ 30
What is the lowest pocket money?
