a)Rounded to three decimal places, give the value for the margin of error of the 90% confidence interval used to estimate the true proportion of parents who have tried to implement screen time restrictions on their teenagers.
b)Give the lower boundary of the confidence interval rounded to three decimal places.
c)Give the upper boundary of the confidence interval rounded to three decimal places.
A Pew Research Center survey of 743 U.S. teens (ages 13 to 17) and 1,058 U.S. parents of teens was conducted between March 7th and April 10th, 2018, regarding screen time and device-related distractions. Amongst the parents surveyed, 603 reported that they have made efforts to implement screen time restrictions on their teen(s) in one way or another. Use this information to calculate a one-proportion z-interval at the 90% confidence level to estimate the true proportion of U.S. parents of teenagers who have tried to instill screen time restrictions on their teenage children.