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3 . Properties of point estimators Suppose that O is a point estimator of a parameter 0. The following graph shows sampling distributions of 0 for three different sample sizes: n =5, 10, and 50. n = 50 n = 10 n = 5 Based on the graph, which of the following statements are true? Check all that apply. 0 is a biased estimator of 0. O O is a relatively efficient estimator of 0. O O is a consistent estimator of 0