vered . Question 18 Suppose the true proportion of voters in the county who support a school bond measure is 0.52. Consider the sampling distribution for the proportion of supporters with sample size n = 111. What is the mean of this distribution? Round to three decimal places. What is the standard deviation of this distribution? Round to at least 5 decimal places. Is the distribution of the sample proportion normal? No, the distribution of sample proportions is not normal since np(1 - p)