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After a polution event in an estuary, we want to estimate proportion of shell sh that are impacted by the pollution in the water. What

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After a polution event in an estuary, we want to estimate proportion of shell sh that are impacted by the pollution in the water. What sample size do we need to ensure our 95% condence interval is no more than +/-0.03 given no information on the likely level of the proportion? (3 601 (3 1025 (3 2401 (3 1068

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