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Suppose we have independent random samples of size n1= 420 and n2= 510. The proportions of success in the two samples are p1= .38 and

Suppose we have independent random samples of size n1= 420 and n2= 510. The proportions of success in the two samples are p1= .38 and p2= .43. Find the 99% confidence interval for the difference in the two population proportions.

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