If researchers measure every tenth member of a population, they have:
A)conducted a census.
B)collected a sample.
C)increased internal validity.
D)biased the study.

Question

Quizplus · Accepted Answer

Researchers have collected a sample by measuring every tenth member of a population, which is a common sampling method called systematic sampling. This method can be useful in reducing sampling bias and increasing external validity if the population has no underlying patterns or structures. However, it may introduce bias if there are patterns or structures present in the population that are related to the research question. It is not considered a census because not every member of the population is measured. Internal validity is not necessarily increased or decreased by this sampling method as it depends on other factors such as the study design and the control of confounding variables.

If Researchers Measure Every Tenth Member of a Population, They