The OLS estimator is derived by A) connecting the Yi ...

[Kikoku]

The OLS estimator is derived by
 
  A) connecting the Yi corresponding to the lowest Xi observation with the Yi corresponding to the highest Xi observation.
  B) making sure that the standard error of the regression equals the standard error of the slope estimator.
  C) minimizing the sum of absolute residuals.
  D) minimizing the sum of squared residuals.

Question 2

Comparing the California test scores to test scores in Massachusetts is appropriate for external validity if
 
  A) Massachusetts also allowed beach walking to be an appropriate P.E. activity.
  B) the two income distributions were very similar.
  C) the student-to-teacher ratio did not differ by more than five on average.
  D) the institutional settings in California and Massachusetts, such as organization in classroom instruction and curriculum, were similar in the two states.

[cclemon1]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: D

[Kikoku]

Thank you

[cclemon1]

Happy to help you