Effect size dari output regresi/t-test — Cohen's d
d = |μ₂ − μ₁| / σ
pooled
. Dua distribusi normal saling overlap — lihat seberapa banyak tumpang-tindih.
Mean Grup A
50
Mean Grup B
55
SD pooled
10
Efek kecil (d≈0,2)
Efek sedang (d≈0,5)
Efek besar (d≈0,8)
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Cohen's d
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Overlap distribusi
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luasan tumpang-tindih
U₃ Cohen
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persentil B vs A
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