Question
Which of the following errors is more serious and why?
(a) Sampling error
(b) Non-sampling error.
Solution
Non-sampling error is more serious than sampling error because a sampling error can be minimised by taking a larger sample. But it is difficult to minimise non-sampling error even in a large sample.
Some of the non-sampling errors are:
(i) Errors in data acquisition,
(ii) Non-response erros and
(iii) Sampling bias.
