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pearsons product moment correlation coefficient?
working out the value of R in pearons product moment correlation coeficient can you help me here are my values:
1 Answer
- cidyahLv 71 decade agoFavorite Answer
Number of cases 18
∑ X = 1429
∑ Y = 1203
∑ X^2 = 121127
∑ Y^2 = 136829
∑ XY = 81652
∑ X ∑ Y = 81652
r
= ( ∑ XY - ∑X ∑Y / n ) / SQRT { [∑ X^2 - (∑X)^2 / n] [∑ Y^2 - (∑Y)^2 / n]}
Numerator of r = (81652) - (1429)(1203) / 18 = -13852.833333
Denominator of r =
SQRT[121127 - (1429)^2 / 18] * SQRT[136829 - (1203)^2 / 18]
= SQRT[7680.277778] * SQRT[56428.5]
r = -13852.833333 / [87.63719] * [237.54684]
Correlation coefficient r = -0.6654
