2ND EDITION VERZANI SOLUTIONS
MANUAL EXAM SCRIPT 2026 TESTED
QUESTIONS AND VERIFIED SOLUTIONS
⩥ What is a Stratified Sample? Answer: A sampling method that
separates the population into groups and then takes a Simple Random
Sample from each group.
⩥ What is a Cluster Sample? Answer: A sampling method where entire
groups are randomly selected and everyone in those groups is sampled.
⩥ What is Undercoverage in sampling? Answer: A type of bias where
some groups in the population are not represented in the sample.
⩥ What is Nonresponse Bias? Answer: A type of bias that occurs when
individuals selected for the sample do not respond.
⩥ What is Response Bias? Answer: A type of bias where respondents
provide inaccurate answers, often due to confusing wording.
⩥ What are the two types of variables? Answer: Categorical
(labels/groups) and Quantitative (numerical measurements).