In which of the following is randomization NOT possible?
A) selection of a sample from the population
B) assignment of participants to groups
C) post-testing of participants
D) assignment of treatment type to groups

Question

Quizplus · Accepted Answer

Randomization is not possible in post-testing of participants, as the testing is done after the intervention or treatment has already been given. Randomization is done before any treatment is given to ensure that the groups are equivalent at the outset, so that any differences observed between the groups can be attributed to the treatment or intervention. Randomization is possible in the selection of a sample from the population, assignment of participants to groups, and assignment of treatment type to groups.

In Which of the Following Is Randomization NOT Possible