| Population Inquiry | Sample Inquiry |
| 1. In population survey all units are examined. Hence it requires more time. | 1. In sample survey few units are examined. Hence it requires less time. |
| 2. The cost of survey is more. | 2. The cost of survey is less. |
| 3. As more units are to be examined proper accuracy cannot be maintained. | 3. Accuracy can be maintained as few units are to be examined. |
| 4. Population study is not possible when the units are to be destroyed during the study. | 4. Sample study can be used when the units are to be destroyed during the study. |
| 5. As more persons are to be employed in the work experts may not be available. | 5. As few persons are to be employed, experts may be available. |
| 6. As more units are to be studied the work becomes tedious. | 6. As few units are to be studied the work is relatively easy. |
| 7. As all units are examined complete information is available. | 7. Limited number of units are examined hence complete information is not available. |
