a. For what value of c is the quantity Σ(x; – c)² minimized? [Hint: Take the derivative with respect to c, set equal to 0, and solve.] - b. Using the result of part (a), which of the two quantities Σ(x; − x)² and Σ(ï¿ – µ)² will be smaller than the other (assuming that ‡µ )?

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