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In 2007, 369 out of a sample of 900 eighth-graders in Atlanta scored at or above...

In 2007, 369 out of a sample of 900 eighth-graders in Atlanta scored at or above the Basic level in mathematics. In large public city, 57% scored at or above the Basic level in mathematics in 2007. (A) Construct a 95% confidence interval estimate for the proportion of eighth-graders who scored at or above the Basic level in Atlanta. What do you conclude? (B) In 2011, 702 out of a sample of 1300 eighth-graders in Atlanta scored at or above the Basic level in mathematics. Construct a 95% confidence interval estimate for the difference in the proportions of eighthgraders who scored at or above the Basic level in Atlanta for the years 2007 and 2011. What do you conclude?

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