Question: Suppose the scientist postulates a model Yi = a + x i + i , i ,2... n, and is a

Suppose the scientist postulates a model Yi = a + β x i + ε i, i — \,2... n, and α is a known value, not necessarily zero.

(a) What is the appropriate least squares estimator of β Justify your answer?

(b) What is the variance of the slope estimator?

150 77.7 150 75.4 150 81.2 200 84.4 200 85.5 20085.7 250 89.025089.4 250 90.5 300 94.8 300 96.7 300 95.3

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