Problema Solution
Find the equation of the regression line.
x 10 8 7 12 14 5
y 20 19 17 25 28 9
Answer provided by our tutors
Y = 1.92771x + 1.67470
_____
y = βx + α
For your numbers, I get
∑x = 56, ∑y = 118,
∑xy = 1208, ∑x2 = 578, n = 6
β = (n∑xy - ∑x∑y)/(n∑x2 - (∑x)2) = 640/332
α = (∑x2∑y - ∑x∑xy)/(n∑x2 - (∑x)2) = 556/332