Problem 4. Suppose X-Uniform(0, 30). Is X an unbiased estimator for 8? If not, what is the bias? Suggest an unbiased estimator for 8? What is the variance of your proposed estimator? It is known that the mean and variance of a uniform random variable are (20) and ().

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Q: How can I solve this? Without getting confused

A: We will fill in the blanks.

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