Section 3.1 Measures of Center 99 a. Find the mean playback time. b. Find the median playback time. c. Find the mode or modes, if any. d. Would you expect the playback times to be skewed to the left, skewed to the right, or approximately symmetric? Explain. 34. Facebook applications: The following table presents the number of monthly users for the 25 most popular Facebook applications as of December 2008. Monthly Users Monthly Users Application (millions) Application (millions) Super Wall 21.4 Birthday Calendar 4.6 Causes 16.6 Pieces of Flair 4.6 Top Friends 15.3 SuperPoke! 4.5 Slide FunSpace 11.6 Pass a Drink 4.4 Bumper Sticker 7.5 Likeness 4.0 Texas HoldEm Poker 7.1 Who Has the Biggest Brain? 3.7 We’re Related 6.9 Birthday Cards 3.6 Movies 6.3 Are YOU Interested? 3.5 (Lil) Green Patch 6.0 Word Challenge 3.5 iLike 5.7 Snowball Fight! 3.4 Compare People 5.4 Geo Challenge 3.4 Hug Me 5.4 Mobile 3.1 Pet Society 4.7 Source: www.allfacebook.com a. Find the mean number of monthly users. b. Find the median number of monthly users. c. Would you expect these data to be skewed to the right, skewed to the left, or approximately symmetric? Explain. 35. What’s your favorite TV show? The following tables present the ratings for the top 20 prime-time shows for the 1997–1998 and 2007–2008 seasons. The rating is the percentage of households with TV sets that watched the program. Top Rated TV Programs: 1997---1998 Top Rated TV Programs: 2007---2008 Program Rating Program Rating Seinfeld 21.7 American Idol — Tuesday 16.1 ER 20.4 American Idol — Wednesday 15.9 Veronica’s Closet 16.6 Dancing With the Stars— Monday (2007) 14.0 Friends 16.1 Dancing With the Stars— Tuesday (2007) 12.7 Monday Night Football 15.0 Dancing With the Stars— Monday (2008) 12.6 Touched by an Angel 14.2 Dancing With the Stars— Tuesday (2008) 11.8 60 Minutes 13.8 Desperate Housewives 11.6 Union Square 13.6 CSI 10.6 CBS Sunday Movie 13.1 House— Tuesday 10.5 Frasier 12.0 Grey’s Anatomy 10.4 Home Improvement 12.0 Sunday Night Football 9.7 Just Shoot Me 11.9 CSI: Miami 9.2 Dateline NBC —Tuesday 11.5 House— Monday 9.2 Dateline NBC —Monday 11.4 NCIS 9.2 The Drew Carey Show 11.1 Survivor: China 9.0 20/20— Friday 10.9 Without a Trace 8.8 N.Y.P.D. Blue 10.8 The Moment of Truth 8.8 Primetime Live 10.8 Two and a Half Men 8.5 The X-Files 10.6 60 Minutes 8.4 Law and Order 10.2 Criminal Minds 8.2 Source: www.classictvhits.com Source: Nielsen Media Research a. Find the mean and median ratings for 1997–1998. b. Find the mean and median ratings for 2007–2008. c. The total number of TV channels increased considerably between 1998 and 2008. Some media experts believe that the audience is now spread out over more channels so that ratings are not as high as they used to be. Do the results of parts (a) and (b) support this claim? Explain. 36. Beer: The following table presents the number of active breweries for samples of states located east and west of the Mississippi River.
navidi_monk_essential_statistics_1e_ch1_3
To see the actual publication please follow the link above