How effective is gastric bypass surgery in maintaining weight loss in extremely obese people? A study conducted found that 76% of an SRS of 426 subjects who had received gastric bypass surgery maintained at least a 20% weight loss six years after surgery.  Give a 90% confidence interval for the proportion of those receiving gastric bypass surgery that maintained at least a 20% weight loss six years after surgery. (Round your answers to four decimal places.)

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How effective is gastric bypass surgery in maintaining weight loss in extremely obese people? A study conducted found that 76% of an SRS of 426 subjects who had received gastric bypass surgery maintained at least a 20% weight loss six years after surgery. 

Give a 90% confidence interval for the proportion of those receiving gastric bypass surgery that maintained at least a 20% weight loss six years after surgery. (Round your answers to four decimal places.)

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