A sample in which the sampling units are chosen from the population by means of a random mechanism is a:
A) probability sample
B) judgmental sample
C) stratified sample
D) systematic sample

Question

Quizplus · Accepted Answer

A probability sample is one in which the sampling units are selected based on probability theory, such as simple random sampling, cluster sampling, or stratified random sampling. This ensures that each unit in the population has an equal chance of being selected, minimizing bias and increasing the representativeness of the sample. The other options listed (judgmental, stratified, and systematic) do not involve a random mechanism for selecting the sampling units and therefore may introduce bias into the sample.

A Sample in Which the Sampling Units Are Chosen from the Population