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please help and show all work in excel. Thanks!

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Statistics and Probability_7612754.xls

Solution:
a.
100(1-α)% confidence interval for the difference of proportions is:
(p1-p2)±s*t*sqrt(1/n1+1/n2), where s = pooled std. dev.= sqrt(P*Q*sqrt(1/n1+1/n2)),
where P =...

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