Question

question 20 0.5 pts from our outside content... which form of sampling is often needed to survey hard to reach members of a population? snowball sampling probability sampling random digit dialing stratified sampling

Explanation:

Snowball sampling is a non - probability sampling technique where existing study subjects recruit future subjects from among their acquaintances. This method is particularly useful when the population of interest is hard - to - reach (e.g., people with rare diseases, homeless individuals, etc.). Probability sampling involves random selection and is not focused on hard - to - reach populations. Random digit dialing is a method for sampling phone numbers and is not specific to hard - to - reach populations. Stratified sampling divides the population into subgroups and then samples from each subgroup, which is not for hard - to - reach populations.

Answer:

A. Snowball sampling