Random assignment is feasible only when an investigator is using an _____ strategy to "create" values on a(n)_____ variable.
A)experimental;dependent
B)observational;independent
C)observational;dependent
D)experimental;independent

Question

Quizplus · Accepted Answer

Random assignment is a technique used in experimental research, not observational research, to assign participants to different groups (independent variable levels) randomly, thereby creating variation on the independent variable. Thus, the correct choice is D since random assignment creates variation on the independent variable in experimental research.

Random Assignment Is Feasible Only When an Investigator Is Using