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Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
Predictor
Coefficient
Standard Error
Constant
30.139
1.181
X
-0.252
0.022
Analysis of Variance
SOURCE
SS
Regression
1,759.481
Error
259.186
a) Develop the estimated regression line.
b) At α = 0.05, test for the significance of the slope.
c) Determine the coefficient of determination.
d) Determine the coefficient of correlation
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