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E Confidence Intervals and Hypothesis Testing Introduction to constructing a confidence interval for a population mean. 3/5 Kersten V Espanol A political newspaper, Keeping It Political, is interested in the distances voters in Grand Ridge County live from their nearest polling station. Keeping It Political has hired you to estimate the population mean of all such distances for voters in this county. To estimate this population mean, you select a random sample of 17 Grand Ridge County voters and record the distance (in km) each voter lives from their nearest polling station. Assume the population is approximately normally distributed. Based on your sample, follow the steps below to construct a 99% confidence interval for the population mean of all the distances voters in Grand Ridge County live from their nearest polling station. (If necessary, consult a .) ? (a) Click on "Take Sample" to see the results for your random sample. Number of voters Sample mean Sample standard deviation Take Sample 17 4.179 2.023 Enter the values of the sample size, the point estimate of the mean, the sample standard deviation, and the critical value you need for your 99% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute". Sample size: 5 X Standard error: Point estimate: Sample standard deviation: Marain of error: Confidence Critical value Explanation Check 2025 McGraw Hill. Terms of Use | Privacy Center | Accessibility 99% confidence interval: 95% 10.025 = 2.120 Compute 90% 10.050 = 1.746 (b) Based on your sample, enter the lower and upper limits to graph the 99% confidence interval for the population mean of all the distances voters in Grand Ridge County live from their nearest polling station. 0.000 10.000 0.000 2.000 4.000 6.000 8.000 10.00 X