Examen in Statisticis Negotiis II Anni II Anni Core 6
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Questions and Answers

Quae est formula ad calculandum 'coefficientem correlationis'?

  • r = Σ((X - X̄)(Y - Ȳ)) / √(Σ(X - X̄)² * Σ(Y - Ȳ)²) (correct)
  • r = Σ((X - X̄)(Y - Ȳ)) / (Σ(X - X̄) * Σ(Y - Ȳ))
  • r = Σ((X - X̄) * (Y - Ȳ)) / √(Σ(X - X̄)² * Σ(Y - Ȳ)²)
  • r = Σ((X - X̄) * (Y - Ȳ)) / (Σ(X - X̄) * Σ(Y - Ȳ))
  • Quid significat 'coefficientes determinationis'?

  • Indicat quam bene variatio unius variabilis explicatur per aliam variabilem in modello regressionis (correct)
  • Indicat quantitatem variabilis in modello regressionis
  • Indicat correlationem inter duae variabiles
  • Indicat magnitudinem erroris in modello regressionis
  • Quid est 'propositio nullius hypothesios' in testibus hypothesis?

  • Hypothesis quae est rejectanda
  • Hypothesis quae est testanda (correct)
  • Hypothesis quae est acceptanda
  • Hypothesis quae est respicienda
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