Final answer:
The margin of error is calculated by taking the difference between the upper and lower limits of the confidence interval and dividing by 2. For the interval (0.348, 0.382), the margin of error would be 0.017, but the prescribed value is 0.018 which is to be used for further calculations.
Step-by-step explanation:
The question involves determining the margin of error (EBP) from a given confidence interval for a population proportion. To find the margin of error when the confidence interval is between 0.348 and 0.382, we take the upper limit and subtract the lower limit, then divide by 2: EBP = (0.382 - 0.348) / 2 = 0.034 / 2 = 0.017. However, since the margin of error given in the question is 0.018, we should use the provided margin of error for calculations or interpretations related to this interval.
Interpreting the confidence interval means that we are 90 percent confident that the true population proportion falls within the specified range. For example, if the confidence interval is (0.564, 0.636), we interpret this to mean that we are 90 percent confident that the true proportion of the population is between 56.4 percent and 63.6 percent.