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A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 330 330 babies wereborn, and 297 297

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 330

330 babies wereborn, and 297

297 of them were girls. Use the sample data to construct a 99

99% confidence interval estimate of the percentage of girls born. Based on theresult, does the method appear to beeffective?

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