Economics True/False

False.
Reason: Non-sampling errors are more serious than sampling errors and it is difficult to minimize them, ever by taking a large sample.
Some of the non-sampling errors are: Errors in data Acquisition, non-response errors, sampling bias, processing errors, etc.

False.Expaianation:
The data collected by the investigator is primary data.

False.
Reason: Telephone survey is most suitable method of collecting data when population is illiterate. When population is literate and spread over a large area the most suitable method is mailed questionnaire method.

True, In terms of accuracy of the result, sample method is better than survey.

False.
Reason: There are not many but only two sources of data which are primary and secondary sources of data. A primary source of data is first-hand data which is collected by a researcher from the original source, whereas secondary data is collected by someone in the past and is used by the researcher.

False.
Reason: The data collected by an investigator is called the primary data, whereas, the data that is already in existence being collected by any other investigator is known as secondary data.

False.Explanation:
There are only two sources of data, i.e., primary data and secondary data.

False.Explanation:
Telephonic survey is useful for conducting enquiry over a large area. However, it is not necessary that the population is literate.

True.

Reason: In the non-random selection of items, every item does not have an equal chance of getting selected in the sample. Thus, there are chances of personal biases in the non-random selection of samples.