A study of 420.023 cell phone users found that 134 of them devercoed cancer of the train or nervous system. Pror to this study of cell phone use, the rate of such career win found to be 0.0232% for showe not using cat phones. Camp a. Use the sample data to construct a 50% en erval estimate of the percentage of cet phone users who develop cancer of the brain or nervous system (Round to three decimal places as needed)