47. Top ten video games: According to Wikipedia, the following are the top ten selling video games of all time. Game Title Copies Sold (millions) Release Year System 1. Wii Sports 82.7 2008 Wii 2. Super Mario Bros. Nintendo Entertainment System 40.2 1985 3. Mario Kart Wii Wii 36.4 2008 4. Tetris 1989 Game Boy 35.0 5. Wii Sports Resort 6. New Super Mario Bros. 7. Minecraft: Pocket Edition 2009 Wii 32.8 2006 Nintendo DS 30.8 2011 Android, iOS, and others 30.0 8. New Super Mario Bros. Wii 9. Wii Play 2009 Wii 29.3 2006 Wii 28.0 10. Kinect Adventures 2010 Хbox 360 24.0 a. Which of the columns represent qualitative variables? b. Which of the columns represent quantitative variables? c. Which of the columns represent nominal variables? d. Which of the columns represent ordinal variables?

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