What Is Periodicity

Multiple Choice

What is periodicity?

A) It is a nonprobability sample type for which a researcher recruits study participants by asking prior participants to refer other.
B) It is the idea that a study's results will tell us something about a group larger than the sample from which the findings were generated.
C) It is a nonprobability sample type for which a researcher identifies subgroups within a population of interest and then selects some predetermined number of elements from within each subgroup.
D) It is the tendency for a pattern to occur at regular intervals.
E) It is the distance between elements selected for inclusion in a study.