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A random sample of 861 births in a state included 429 boys. Construct a 95% confidence interval estimate of the proportion of boys in all

A random sample of 861 births in a state included 429 boys. Construct a 95% confidence interval estimate of the proportion of boys in all births. It is believed that among all births, the proportion of boys is 0.509. Do these sample results pro strong evidence against that belief? Construct a 95% confidence interval estimate of the proportion of boys in all births. [

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