Discussion
Consider the following statements and select the correct answer using the codes given below :
(a) Random sampling is called as probability sampling.
(b) Random sampling is done with help of random table.
(c) Landscape elements are generally scattered at random.
Answer: A
Statements (a) and (b) are correct. Random sampling is called probability sampling, since each unit has a known chance of selection, and it is done with the help of a table of random numbers.
Statement (c) is not accepted, since landscape elements are not generally scattered at random and the key does not count it. Options B, C and D, which include (c), are therefore wrong.
Random sampling gives every member of the population an equal chance of being selected, and a table of random numbers is the usual device for choosing the sample points. Landscape elements are not usually scattered by chance, because they follow soil, relief and settlement, so statement (c) fails.
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