Question

Problem 5: Identify what the sampling method for each of the following: a. A non-profit organization wants to create a sample of girls across ten neighboring towns to provide education. Suppose the non-profit randomly selects three of the towns and includes every girl in these towns in their sample. b. The NYS Department of Transportation evaluated the quality of the NY Thruway by testing core samples collected every 4 miles.

Answer 1

Ans:

a)

Cluster sampling

( With cluster sampling, the researcher divides the population into separate groups, called clusters. Then, a simple random sample of clusters is selected from the population. )

b)

Systematic sampling

(Systematic sampling is a type of probability sampling method in which sample members from a larger population are selected according to a random starting point and a fixed, periodic interval. This interval, called the sampling interval, is calculated by dividing the population size by the desired sample size.)