In: Statistics and Probability
A data collecting polling agency gathers data by calling the first phone number on every page on yellow pages (a phone book). Which sampling technique is this?
Answer:
Judgment sampling
Explanation:
...because the sample observations are selected by using some specific interval of one page of yellow pages phone book, but first observations is not selected randomly, so it is a judgement sampling. If sample observations are selected by keeping systematically fix interval, then this sampling is called as systematic sampling.