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Use multiple linear regression to fit x1 0 0 1 2 0 1 2 2 1...

Use multiple linear regression to fit
x1 0 0 1 2 0 1 2 2 1
x2 0 2 2 4 4 6 6 2 1
y 14 21 11 12 23 23 14 6 11
Compute the coefficients, the standard error of the estimate, and the
correlation coefficient.

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