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A 2011 Gallup poll found a 90% confidence interval of (0.7248, 0.7944) for the proportion of...

  1. A 2011 Gallup poll found a 90% confidence interval of (0.7248, 0.7944) for the proportion of all U.S. adults who believe that high achieving high school students should be recruited to become teachers. This was based on a random sample of U.S. adults. Find the a) observed sample proportion, b) the margin of error of this confidence interval, c) the standard error of , and d) the sample size. [Please note that you are asked to find four quantities above – don’t forget one! Hint: you will most likely want to find each value in order a through d. You will need to use algebra to solve for unknown quantities in c & d.] Show your work!!
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