A __________ is an inert substance.
A)maturation
B)regression to the mean
C)history
D)placebo

Question

Quizplus · Accepted Answer

A placebo is an inert substance, meaning it has no active ingredient or effect on the body, but is administered to a patient to satisfy their psychological need for treatment or to control for the placebo effect in a research study. Maturation refers to changes that occur naturally over time, regression to the mean is a statistical phenomenon where extreme values tend to move closer to the average over time, and history refers to past events and their impact on the present.

A __________ Is an Inert Substance