0Advantages of pilot survey are
(i) The questions to he asked are being tested through pilot survey.
(ii) The problems which may arise during large survey are guessed and solutions are found out.
(iii) Some aspects of data can be estimated.
(iv) The time and cost of actual survey can be estimated exactly.
'A good sample is generally based on correctness and continuity’. In the context of above statement explain the characteristics of good sample
The characteristics of goods sample are
(i) The sample should be independent.
(ii) All individual units included in the sample should be Independent.
(iii) The reliability of sample should be based on correctness.
(iv) The sample should be based on continuity and law of inertia of large numbers.
