Data handling
Outliers pull the mean and barely move the median. Students distinguish discrete from continuous data, build stem-and-leaf plots (including back-to-back), compute center and range for grouped and ungrouped data using midpoints, and spot a misleading graph.
Specification · for a parent or teacher
- data-handling-7
- Advanced Math 7 · Unit 15
- Applied
- 3 of 4 — Grade 6–7 core. Multi-step, first symbolic work.
- 5 items
Students can
discrete vs continuous; stem-and-leaf (including back-to-back); mean, median, mode, range for grouped and ungrouped data; pick a typical value; spot a misleading graph.
Ready when
a back-to-back stem-and-leaf, they compare medians and say which class is more spread out.
Watch for
mean of grouped data using interval width instead of midpoint.