# What is the difference between random sampling and simple random sampling?

According to my opinion, random sampling each unit of population has some specified probability (not necessary to be equal) of being selected in the sample. But in SRS each unit of population has equal probability of selected in the sample". Please give appropriate suggestion for this topic?

## Popular Answers

Johannes Schult· Universität des SaarlandesSimple random sample (SRS): every element of the population has the same (nonzero) probability of being drawn. SRS is thus a special case of a random sample.

The inverse of the selection probability can be used to weight the sampled data. The weighting is easier with SRS (than with other types of random samples) because all cases have the same weight.

Rick Edgeman· Aarhus University