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Dasar-Dasar Statistika (Basics of Statistics) by Dr. Riduwan, M.B.A.

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Chapter 8: Correlation

• Pearson r formula: r = nΣxy – (Σx)(Σy) / √[nΣx² – (Σx)²][nΣy² – (Σy)²]
• Interpretation: 0.00-0.20 (very weak), 0.21-0.40 (weak), 0.41-0.70 (strong), >0.70 (very strong).

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Chapter 6: Hypothesis Testing (One Sample)

• Steps:

  📚 Rekomendasi Buku: Dasar-Dasar Statistika oleh Dr. Riduwan, M.B.A. Pearson r formula: r = nΣxy – (Σx)(Σy)