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Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 3 percentage points

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Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 3 percentage points and use a confidence level of 90%. Complete parts (a) and (b) below. . . . a. Assume that p and q are unknown. n = (Round up to the nearest integer.)

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