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2 2 Closest z = -1.28 = 1 1 n= = = 1600 so at least 1600 calls. m 0.025 n b. If repeated random samples of the same number of calls were obtained, we would expect (at least) 95% of the resulting confidence intervals to contain the population proportion p of all calls that are unsatisfactory. The 95% conservative margin of error is m =...
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- Fall '08