learn.howToCalculate
learn.whatIsHeading
Pearson's r measures the strength and direction of the linear relationship between two continuous variables. r ranges from −1 (perfect negative) to +1 (perfect positive); r=0 means no linear relationship.
ステップバイステップガイド
- 1r = Σ(xi−x̄)(yi−ȳ) / √[Σ(xi−x̄)² × Σ(yi−ȳ)²]
- 2Positive r: both variables increase together
- 3Negative r: one increases as the other decreases
- 4r² = proportion of variance in Y explained by X
解いた例
入力
r = 0.85 between height and weight
結果
Strong positive correlation · r²=0.72
Height explains 72% of weight variation
計算する準備はできましたか?無料の Pearson Correlation 計算機をお試しください
自分で試してみる→