Math/statistics

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Thirty five percent of adult americans are regular voters. A random sample of 250 adults in a medium size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on the results. Any help would be greatly appreciated. Please include the steps so I can understand how to do these problems.

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    Are the following statements and valid null and alternative hypotheses? (

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