1). A survey was conducted in July 2015 asking a random sample of American adults whether they had ever used online dating (either an online dating site or a dating app on their cell phone). In a sample of 400 adults (between the ages of 55 and 64) 152 said that they had used online dating. Find the 95% confidence interval for the proportion of all US adults ages 55 to 64 to use online dating. a) The sample statistic = _______________________. (Do not round the answer) b) The margin of error = _______________________. (Show your work and round the final answer to 3 decimal places.) c) The 95% confidence interval is __________________ to __________________. (Show your work and round the final answers to 3 decimal places.)