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A random sample of n z 500 observations from a binomial population produced x = 170 successes. (a) Find a 90% condence interval for 13.

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A random sample of n z 500 observations from a binomial population produced x = 170 successes. (a) Find a 90% condence interval for 13. (Round your answers to three decimal places.) (b) How large should a sample be to estimate the population proportion to within 0.02 of its true value with a 95% probability? Use the proportions from this current study

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