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2. Suppose 5 out of 25 data points in a weighted least-squares proble.pdf

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2. Suppose 5 out of 25 data points in a weighted least-squares problem have a y-measurement that is less reliable than the others, and they are to be weighted half as much as the other 20 points. One method is to weight the 20 points by a factor of 1 and the other 5 by a factor of 21. A second method is to weight the 20 points by a factor of 2 and the other 5 by a factor of 1 . Do the two methods produce different results? Explain..

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2. Suppose 5 out of 25 data points in a weighted least-squares problem have a y-measurement that is less reliable than the others, and they are to be weighted half as much as the other 20 points. One method is to weight the 20 points by a factor of 1 and the other 5 by a factor of 21. A second method is to weight the 20 points by a factor of 2 and the other 5 by a factor of 1 . Do the two methods produce different results? Explain.

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