1. Short Answer (3 points each):a. Agree or Disagree (and justify your answer):

1. Short Answer (3 points each):a. Agree or Disagree (and justify your answer): If the
distribution of u in a population
regression model is not normal then the OLS estimators are not BLUE.b. Agree or Disagree (and justify your answer): If you add
an independent variable to a multiple regression model and the R-squared value
rises this indicates that adding the variable to the model was a good idea.c. Consider the following population regression model
explaining the yield per acre of a plot of land planted with corn (yield) as a function of the inches of
rain falling on the plot in the first month of the growing season (rain) and the kilograms of a certain
brand of fertilizer added to the plot (fertilizer).
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