The Pew Research Center surveyed 2,076 American adult cell phone users chosen at random in 2013. The sample percent of adult cell phone users who access the internet on their phone was 60%. The 95% confidence interval was 58% to 62%. What is this interval attempting to estimate? The average number of American adult cell phone users who access the internet on their phones in 2013. The percent of the 2,076 American adult cell phone users who access the internet on their phones in 2013. The percent of all American adult cell phone users who access the internet on their phones in 2013. For American adults who access the internet on their cell phones, only 58% to 62% were confident in using the internet on their phones