This 30-60 minute lesson plan is designed for 7th-9th graders with the objective of calculating mean and range and making inferences about data sets using these two mathematical devices. The lesson includes five pages of redacted notes and three activities/practice problems with critical thinking questions for students. These activities individually could be used in classrooms from 5th-12th grade, as they are organized in order of difficulty. This lesson attempts to make several real world connections to the objective.
Good luck, and I would truly appreciate feedback!