Bias or Unbiased. Test your self!!!
http://www.mathgames.com/skill/6.86-identify-representative-random-and-biased-samples
https://www.ixl.com/math/grade-7/identify-representative-random-and-biased-samples
http://mrnussbaum.com/the-jellybean-tree-ipad.html
http://www.harcourtschool.com/activity/counting_objects/
http://www.harcourtschool.com/activity/olivia_octagon/activity6/a6Shell_6.html
https://www.ixl.com/math/grade-7/interpret-box-and-whisker-plots
http://pbskids.org/cyberchase/math-games/bugs-in-the-system/
http://www.harcourtschool.com/activity/elab2004/gr6/23.html
http://www.mathgames.com/skill/6.86-identify-representative-random-and-biased-samples
https://www.ixl.com/math/grade-7/identify-representative-random-and-biased-samples
http://mrnussbaum.com/the-jellybean-tree-ipad.html
http://www.harcourtschool.com/activity/counting_objects/
http://www.harcourtschool.com/activity/olivia_octagon/activity6/a6Shell_6.html
https://www.ixl.com/math/grade-7/interpret-box-and-whisker-plots
http://pbskids.org/cyberchase/math-games/bugs-in-the-system/
http://www.harcourtschool.com/activity/elab2004/gr6/23.html