Discussion
.............. and .............. are the procedures for selecting samples through simple random method.
(i) Identifying samples conveniently
(ii) Listing of participants categorywise and choosing samples from each category
(iii) Numbering all the elements of the population and then selecting samples using table of random numbers
(iv) Selecting samples by lottery system
Answer: D
The simple random procedures are the random number table and the lottery, so the answer is (iii) and (iv) are correct.
In simple random sampling every element of the population has an equal chance of selection. The two standard ways of achieving this are to number every element and choose with a table of random numbers (iii), or to use a lottery, drawing numbered slips (iv).
Choosing samples conveniently (i) is convenience sampling, a non-probability method. Listing participants category-wise and sampling from each category (ii) is stratified sampling. Neither is simple random sampling, so the options with (i) or (ii) are wrong.
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