Question: =+with fluoridated water had decayed teeth. Let p1 denote the true proportion of children drinking fluoridated water who have decayed teeth, and let p2 denote

=+with fluoridated water had decayed teeth. Let p1 denote the true proportion of children drinking fluoridated water who have decayed teeth, and let p2 denote the analogous proportion for children drinking unfluoridated water. Estimate p1 2 p2 using a 90% confidence interval. Does the interval contain 0? Interpret the interval.

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