14. Which of the following statements about the property of an estimator is not true ? (A) Unbias cannot assure consistent. (B) Consistent not necessarily assures unbias. (C) There are only one estimator with the properties of both unbias and consistency. (D)An unbias estimator is not necessarily more efficient than a bias estimator.

11. To test that per capita GDP of Taiwan in 2019 is no less than twenty thousand US dollars, if the significant level is 5%, which of the following statement is true? (A) Two tailors test is needed. (B) Right tailor is needed. (C) If the P-value is 0.03, then we cannot rejected null hypothesis. (D)For a given sample, the P-value is negatively related to the per capita GDP level that we want to test.

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