7/25/2019 Tema 4 Neagoe Paula.xls

1/2

i xi yi xi2 xi*yi Sxi Syi Sxi2 Sxi*yi 1 1 1 1 1

15 8 55 20 50

2 2 2 4 4

3 3 3 9 9

4 4 4 16 16

5 5 -2 25 -10

i xi yi xi2 xi3 xi4 xi*yi xi2*yi Sxi Syi1 1 1 1 1 1 1 1

15 8

2 2 2 4 8 16 4 8

3 3 3 9 27 81 9 27

4 4 4 16 64 256 16 64

5 5 -2 25 125 625 -10 -50

D 979 225 55 D 700225 55 15

55 15 5

Da 50 225 55 Da 980020 55 15

8 15 5

Db 979 50 55 Db 3920225 20 15

55 8 5

Dc 979 225 50 Dc -2940225 55 20

55 15 8

a 14b 5.6c -4.2

7/25/2019 Tema 4 Neagoe Paula.xls

2/2

a b a b y=a*x+b

-20 140 -0.4 2.8 2.4

SXi2 Sxi3 Sxi4 Sxi*yi SXi2*yi

55 225 979 20 50