Distinguish between
(1) primary data and secondary data
(2) census method and sample method 1
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Explanation:
Primary data - the data which is in its original form in which no changes had been done is called primary data.
Secondary data - the data which is taken form the other sources which already have the particular data.
Census method - it is that method in which data is collected from all over the universe.
Sample method - it is that method in which data is collected randomly.
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