Regression Quiz

  1. State the 2 inferences drawn when using regression data. slope, intercept
  2. State the assumptions for regression inference.
  1. Fill ou the table shown below and use it to calculate the standard error (s) of the least squares regression line.

s = [ S(y - ŷ)2 / (n-2) ]1/2               ŷ = 2.05x - 0.067      s = 0.286

  Data Points Total
X 1 2 3  
Y 2.1 3.8 6.2  
ŷ 1.983 4.033 6.083  
(y - ŷ) 0.177 -0.233 0.177  
(y - ŷ)2 0.0137 0.0543 0.0137 0.0817