Question

difference between random and non random sampling for 4 marks
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Answer 1

Explanation:

Although random sampling is generally the preferred survey method, few people doing surveys use it because of prohibitive costs; i.e., the method requires numbering each member of the survey population, whereas nonrandom sampling involves taking every nth member.

Answer 2

Answer:

Random sampling refers to the method in which each of the sampling unit (units in the population) has a non-zero probability of being selected into the sample. Simple random sampling is a special case of random sampling when each of the sampling unit has equal chance of being selected.

Non random sampling is a method of sampling wherein, it is not known that which individual from the population will be selected as a sample.