What Proportion of Americans Say They Are Poor? A survey of 1000 US Adults conducted in October 2019 found that 182 of them described themselves as poor. In Exercise 3,128, we used a bootstrap distribution to find a 90% confidence interval for the proportion of all US adults who would describe themselves as poor. Here, we find this 90% confidence interval using the normal distribution and a formula for the standard error, as follows: (a) Give notation and value for the sample statistic. Choose notation from the following list: 1) n: 2) : 3) p:4) u: 5) p: 6) p. Notation Value = (b) Find the standard error for this sample statistic. Round to three decimal places. (c) What is z* for a 90% confidence interval? Round to three decimal places. (d) Use the results of (a). (b), and (c) to find the 90% confidence interval. Round to three decimal places. to