In a survey of 1741 US adults, 697 said they think genetically modified food is safe. A 95% confidence interval for the proportion, p, of all US adults who think genetically modified food is safe, is closest to O 0.4 ± 0.23 O 0.4 ± 0.039 O 0.4±0.023 O 0.4±0.39

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