Algebra-1

Question Analysis
This question involves identifying causation in a controlled psychological experiment.
The main focus is on recognizing that random assignment and a control group allow researchers to conclude that meditation directly reduces stress.

Key Concept Explanation
Causation is confirmed when an experiment uses random assignment to ensure groups are similar except for the treatment (meditation), and the treatment group shows a different outcome (lower stress).
Random assignment rules out pre-existing differences between groups, proving the treatment (meditation) is the cause of the effect (reduced stress).

Step-by-Step Solution
Analyze the experimental design: The study uses random assignment to create two comparable groups, with only one group practicing meditation.
Evaluate the outcome: The meditation group has l...