In a nationwide poll of 1000 randomly sampled adults conducted in June 2011, 83% said they think children spend too much time on their computers and other electronic devices (but 37% say time spent on a computer is better than time spent in front of a TV).1
Find a 99% confidence interval for the proportion of adults who believe children spend too much time on electronic devices.Round your answers to three decimal places.
(a) What is the 99% confidence interval?
(b) What is the margin or error?
(c) Is it plausible that the proportion of all adults who feel this way is less than 79%?
(d) Is it plausible that the proportion is greater than 84%?