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प्रश्न
What secondary data?
उत्तर
The word data means information statistical data and of two types
(i) Primary data, (ii) Secondary data
Secondary data: data which are not originally collected rather obtained from published or unpublished sources are known as secondary data.
Secondary data are collected by an individual or an institution for some purpose and are used by someone else in another context
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संबंधित प्रश्न
Describe some fundamental characteristics of statistics.
Which of the two – the primary or the secondary data – is more reliable and why?
Explain the meaning of the term Class-mark.
For a certain distribution, mode and median were found to be 1000 and 1250 respectively. Find mean for this distribution using an empirical relation.
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:
The monthly income of 100 families are given as below :
| Income in ( in ₹) | Number of families |
| 0-5000 | 8 |
| 5000-10000 | 26 |
| 10000-15000 | 41 |
| 15000-20000 | 16 |
| 20000-25000 | 3 |
| 25000-30000 | 3 |
| 30000-35000 | 2 |
| 35000-40000 | 1 |
Calculate the modal income.
Define primary data and secondary data.
Explain the meaning of the following terms: Class mark
Class mark of a class is obtained by using ______.
Can the experimental probability of an event be greater than 1? Justify your answer.
