Which is true about randomized experiments?
I. Randomization reduces the effects of confounding variables.
II. Random assignment of treatments allows results to be generalized to the larger population.
III. Blocking can be used to reduce the within-treatment variability.
A) I only
B) I, II, and III
C) II only
D) III only
E) I and III

Question

Quizplus · Accepted Answer

Randomization helps control confounding variables (I), and blocking reduces within-treatment variability (III). However, random assignment does not ensure generalizability to a larger population (II).

Which Is True About Randomized Experiments