Question
State the difference between primary and secondary data.
✓
Answer
| No. | Primary data | No. | Secondary data |
| $1.$ | Primary data are collected for the first time and hence original. | Secondary data are not original but it is the collected data reused by others. | |
| $2.$ | Primary data are collected on the units under inquiry. | Secondary data are obtained from the primary data. | |
| $3.$ | Primary data are original and hence the nature of primary data is quite extensive. Usually such data are in raw form. Hence, they are required to be classified and tabulated. |
Secondary data may be in organised and tabulated form, i.e., they are usually in classified form. |
|
| $4.$ | Since primary data are independently collected, large amount of resources, manpower and monetary cost are involved for their collection. |
Secondary data are cost effective in terms of time, energy and money. |
|
| $5.$ | Primary data are reliable in the sense that they are collected by authorised organisations. |
Secondary data are collected by individuals or institutions for their own interest and hence may not be reliable or relevant from the point of view of user’s interest or purpose. | |
| $6.$ | Special characteristics, limitations and accuracy of primary data can be ascertained. | Some precautions are to be taken before using secondary data. |
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