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Suppose the true proportion of voters in the county who support a specific candidate is 0.65. Consider the sampling distribution for the proportion of supporters

Suppose the true proportion of voters in the county who support a specific candidate is 0.65. Consider the sampling distribution for the proportion of supporters with sample size n = 123. What is the mean of this distribution? What is the standard error (i.e. the standard deviation) of this sampling distribution, rounded to three decimal places

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