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8.6 Two determinations are made of the parameters of a straight line y = ax + b. The first is a1 = 4, b1 =

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8.6 Two determinations are made of the parameters of a straight line y = ax + b. The first is a1 = 4, b1 = 12 and the second is a2 = 3, by = 14. The associated variance matrices are V1 and V2 = _1 -3 ) Find the best estimate for a and b and the associated error matrix

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