An experiment was performed on a group of rats to see if they were affected by loud music another group of rats was left in silence which group was the control group

Procedure: researcher trained all of the rats to get to the end of the maze. ... Strengths: experimental design and controlled variables. ... One group had people who learned their second language as a kid while the other learned their second language Then asked how fast were the cars going when they hit each other

answer; the correct answer is (beta)