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2 10
3 12

4 17

5 22

2
2
x y x y xy
1 4 1 16 4

2 10 4 100 20
3 12 9 144 36

4 17 16 289 68

5 22 25 484 110
15 65 55 1033 238

2
2
(Σx) (Σy) (Σx ) (Σy ) (Σxy)

Koefisien korelasi (r)
r = (4x238 – 15x65) / (√ {5x55-(15)2}{5x1033-(65)2}) = 0.99≈1(ok)

β = (5x238 – 15x65)/ 5x55 – (15)2 = 4.3

α = 65/5 – (4x3(15))/5 = 0.1

Y = α + β.x -Æ y = 0.14 + 4.3.X

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