Use the sampling distributions of the estimators ????1 and ????2 that are used for estimating the parameter ???? shown in Figure 5.5 to answer the following:

(a) Is ????1 an unbiased estimator of ????? Explain.

(b) Is ????2 an unbiased estimator of ????? Explain.

(c) Which estimator has the smaller standard error? Explain.

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