The following tables present the numbers of viewers, in millions for the top 15 prime-time shows for the 2012–2013 and 2015–2016 seasons. The numbers of viewers include those who watched the program on any platform, including time-shifting up to seven days after the original telecast.

a. Find the mean and median ratings for 2012–2013.

b. Find the mean and median ratings for 2015–2016.

c. Is there a substantial difference in the numbers of people watching the top 15 shows between 2012-2013 and 2015-2016, or are they about the same?

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Top Rated TV Programs: 2012-2013 Top Rated TV Programs: 2015-2016 Program Rating Program Rating NCIS 21.6 NFL Sunday Night Football 22.0 Sunday Night Football 21.0 The Big Bang Theory 20.6 The Big Bang Theory 19.0 NCIS 20.5 NCIS: Los Angeles 17.5 The Walking Dead 18.9 Person of Interest 16.2 NFL Thursday Night Football 17.7 American Idol (Wednesday) 15.1 Empire 16.2 Dancing With the Stars (Monday) 15.0 NCIS: New Orleans 16.1 American Idol (Thursday) 14.8 Blue Bloods 14.6 The Voice (Monday) 14.4 Dancing With the Stars 13.7 The Walking Dead 14.3 The X-Files 13.6 Dancing With the Stars (Tuesday) 14.0 The Voice (Monday) 13.5 Two and a Half Men 13.9 Scorpion 13.3 The Voice (Tuesday) 13.5 The Voice (Tuesday) 13.2 Blue Bloods Elementary 13.3 Little Big Shots 13.0 13.3 NFL Monday Night Football 12.9