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File: Ch10, Chapter 10, Random Regressors and Moment-Based EstimationMultiple Choice1. If you are estimatingy = 1 + 2x + eand realize x and y are both random variables, what condition must be true for simple regression estimators to be BLUE?a.) the data have been collected via random samplingb.) the data are time series datac.) e is normally distributedd.) x is normally distributedAns: aLevel: EasySection: 10.12. Which assumption must be true when E(e|x) = 0?3. If, for estimator it is true that p then is
4. If the assumption E(e) = 0 and cov(x,e) = 0 holds, what are the implications of least squares estimators?