Soal SMA · Soal cerita · Kesulitan 4/5
A researcher wants to test if a new teaching method improves math scores. She randomly assigns students to either the new method or the traditional method. At the end, she compares scores. What is the main advantage of random assignment?
- A.It ensures the new method is better.
- B.It eliminates all confounding variables.
- C.It makes the groups comparable on average, reducing bias.
- D.It guarantees a statistically significant result.
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Jawaban: It makes the groups comparable on average, reducing bias.
Random assignment helps balance known and unknown confounding variables across groups, making causal inference more valid.
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