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Answers for “来自重复抽样的点图如何近似精确的抽样分布?”

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A dot plot from repeated samples approximates the sampling distribution by showing the empirical frequencies of the statistic's values. It need not include every possible sample and can vary with the number of simulation repetitions.

Conditions: Repeated samples are drawn from the population.; A dot plot is constructed from the resulting statistics.

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Yes, under the specified random-sampling model, the sample proportion is unbiased for the population proportion. However, the observed mean of a finite number of estimates need not match the parameter exactly.

Conditions: A specified random-sampling model is used.; The estimator is the sample proportion.; The target parameter is the population proportion.