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Find a 95 Percent Confidence Interval for the Difference Between

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Find a 95 percent confidence interval for the difference between the proportions of people who prefer cola versus root beer (RB), where Find a 95 percent confidence interval for the difference between the proportions of people who prefer cola versus root beer (RB), where <sub>cola</sub> = .21, = .12, n<sub>cola</sub> = 200, and n<sub>RB</sub> = 150. cola = .21, Find a 95 percent confidence interval for the difference between the proportions of people who prefer cola versus root beer (RB), where <sub>cola</sub> = .21, = .12, n<sub>cola</sub> = 200, and n<sub>RB</sub> = 150. = .12, ncola = 200, and nRB = 150.

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