Consider the simple linear regression modely=0+1x+

where the intercept0is known.

1. Find the least-squares estimator of1for this model. Does this answer

seem reasonable?

1. What is the variance of the slope(1)for the least-squares estimator found in part a?
2. Find a 100(1)percent CI for1. Is this interval narrower than the estimator for the case where both slope and intercept are unknown?

Consider the simple linear regression model y=0+B1x+ where the intercept [30 is known. 3. Find the least-squares estimator of [31 for this model. Does this answer seem reasonable? b. What is the variance of the slope (E) for the least-squares estimator found in part a? c. Find a 100(1 a) percent CI for [31. Is this interval narrower than the estimator for the case where both slope and intercept are unknown