Is asymptotic unbiasedness is a necessary condition for consistency: counter-example

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Suppose $T_n$ is a sequence of estimators of $\theta$ and suppose $ET_n\nrightarrow\theta$. Is is true that $T_n$ is NOT consistent for $\theta$?

I don't think unbiasedness is a necessary condition for consistency or, convergence in probability. But, I can't figure a counterexample to support my claim. Any help?