Instead of using WLS, the researcher in the previous problem decides tocompute the OLS estimator using only the observations for which x≤ 10,then using only the observations for which x > 10, and then using theaverage the two OLS of estimators. Is this estimator more efficient thanWLS?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.