Question

18)Betsy is collecting data on the amount of time shoppers spend inside of a particular large department store. She stands outside the department store and surveys every 10th shopper who exits. What type of sampling is used? Explain your answer.

Answer 1

Consider the 5 main types of sampling: Random, Systematic, Convenience, Cluster, and Stratified.

In the case of systematic sampling, every kth element of the data set is taken.

In our case, consider all the shoppers and imagine that they can be ordered in a line; then, Betsy selected the 10th shopper in the line, the 20th one, and so on.

This is analogous to systematic sampling; the answer is systematic sampling.