Question: Suppose that we are fitting a line and we wish to make the variance of the regression coefficient B1 as small as possible. Where should

Suppose that we are fitting a line and we wish to make the variance of the regression coefficient B1 as small as possible. Where should the observations xi, i = 1, 2, p, n, be taken so as to minimize V (B1)? Discuss the practical implications of this allocation of the xi.

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