2.7 Do You Listen to Podcasts? In January and February 2019, Edison Research conducted a national telephone survey of 1500 Americans aged 12 and older, using random digit dialing techniques to both cell phones and landlines. The survey included questions about the use of mobile devices, Internet audio, podcasting, social media, smart speakers, and more. Of the 1500 people surveyed, 480 said they had listened to a podcast in the past month. 12 (a) What is the margin of error of the large-sample 95% confidence interval for the proportion of Americans aged 12 and older who had listened to a podcast in the past month? (b) How large a sample is needed to get the common \pm 3 percentage point margin of error? Use the January/February survey of 1500 as a pilot study to get p..

1. 2.7 Do You Listen to Podcasts? In January and February 2019, Edison Research conducted a
national telephone survey of 1500 Americans aged 12 and older, using random digit dialing
techniques to both cell phones and landlines. The survey included questions about the use of
mobile devices, Internet audio, podcasting, social media, smart speakers, and more. Of the 1500
people surveyed, 480 said they had listened to a podcast in the past month. 12 (a) What is the
margin of error of the large-sample 95% confidence interval for the proportion of Americans
aged 12 and older who had listened to a podcast in the past month? (b) How large a sample is
needed to get the common pm 3 percentage point margin of error? Use the January/February
survey of 1500 as a pilot study to get p.