2) Theory short answer Answer the following questions as succinctly as possible

Question

2) Theory short answer Answer the following questions as succinctly as possible thing that a researcher can do to improve the precision of an Explain. unbiased estimator? 2. The following webcomic was published in March of 2009 http://xked.com/552 I USED TO THINK CORRELATION IMPUEDSTATISTICS CLASS. CLASS HELPED. CAUSATION. THEN I TOOK ASOUNDS LIKE THE NOW I DON'T WEll, MAYBE Explain the last line: "Well, maybe." 3. You are trying to estimate the effect of a college education on later life earnings. Why is the difference between the mean earnings of college graduates and the mean earnings of non-college graduates not a good estimate of the causal effect of a college degree on earnings? 4. Explain using the potential outcomes notation how random assignment can eliminate selection bias.

Explanation / Answer

1 ) precision can be improved by increasing the standard error of the estimated regression that signifies the goodness of fit.

moreover it can be improved by reducing the standard error of coefficient of explanatory variables.

and also by increasing the size of the sample as large samples tend to result in good estimation results.

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