Question: Suppose a scientist postulates a model Yi = 0 + 1xi + i, i = 1, 2, . . . , n, and 0 is

Suppose a scientist postulates a model Yi = β0 + β1xi + i, i = 1, 2, . . . , n, and β0 is a known value, not necessarily zero.

(a) What is the appropriate least squares estimator of

β1? Justify your answer.

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

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