8. Given two estimators X1 and X2 for a population mean, E[X1] = 6, V[X1] = 4, and V[X2] = 5. If the true value of the population mean is 5, which of the following is(are) TRUE? %3D I. X1 is an...

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Extracted text: 8. Given two estimators X1 and X2 for a population mean, E[X1] = 6, V[X1] = 4, and V[X2] = 5. If the true value of the population mean is 5, which of the following is(are) TRUE? %3D I. X1 is an unbiased estimator. II. X2 is less precise than X1. O A. I only B. Il only O C. Both I and II O D. Neither I nor II