Construct a confidence interval

timer Asked: Oct 25th, 2015

Question description

Construct a confidence interval for P1-P2 at the given level of confidence.X1=386, N1=535, X2=411, N2= 572 & 99% confidence.(The 99% confidence interval for P1-P2 is __,__).Round to three decimal places as needed.I could really use some help on this problem. I've tried everything. 

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