Regression through the origin
Consider regression through the origin (straight line regression with population intercept know to be zero) with Var(e|x)=x^2sigma^2.
The regression model is Y=Bx+e(i=1,...n).
Find an explicit expression for the weighted least squares estimate of B.
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Set up the matrix B and the vector u such that Bu provides amounts of calories, protein, fiber, and fat contained in the mixture of 3 servings of Shredded Wheat and two servings of Crispix.
Consider regression through the origin (straight line regression with population intercept know to be zero) with Var(e|x)=x^2sigma^2. The regression model is Y=Bx+e(i=1,...n).
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Assume f(-1) was overstated by 2 and f(1) was understated by 3. Find error in original computation of value of interpolating polynomial to approximate f(0).
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