This is a tiered lesson I did for a statistics unit. It could be used as a tiered lesson or it could be used just as 3 practice sheets. The 3 lessons are not dramatically different because I used this in an advanced class so even my lowest tier it is still somewhat advanced. Group A is the lowest tier and group C is the most advanced. This lesson includes mean, median, box plots, and MAD. I have not included an answer sheet yet but I plan to update it with one in the future.