A research assistant takes a survey of local high school students who participate in after-school sports about whether they have suffered a concussion in the last 90 days. This is an example of which method of controlling extraneous variables?
A) Random assignment
B) Bias selection
C) Random sampling
D) Manipulation control

Question

Quizplus · Accepted Answer

Random sampling is used to select participants from a population in a way that each individual has an equal chance of being chosen, which helps control for extraneous variables by ensuring a representative sample.

A Research Assistant Takes a Survey of Local High School