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3. Use the data file on the top 100 Public colleges in 2003 to create a 95% confidence interval for the proportion of college which
3. Use the data file on the top 100 Public colleges in 2003 to create a 95% confidence interval for the proportion of college which have a four year graduation rate of 50% or more. 4. How many schools would need to be selected to be 95% confident that the sample proportion of schools graduating 50% or more of their students in 4 years would be within 4% of the actual population proportion?
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