POE Lesson 4.6 | LockwoodSTEM

✓Lesson Snapshot

I can use variation and standard deviation to compare the consistency of two aerospace designs or test setups.

Compare two sets of mission-performance data and decide which system is more consistent.

Consistency comparison using variation

Notebook, calculator or spreadsheet, sample data

1ProblemUnderstand the challenge and why it matters.

The highest-performing design is not always the best if the results are unpredictable. Aerospace engineers value repeatable performance.

2ConceptLearn the engineering idea or skill.

Standard deviation describes how spread out a data set is around the mean. A smaller spread often means the design or test setup is more consistent.

3ApplyUse the skill in a guided task.

Compare two repeated-trial data sets using average performance and variation. Decide which design is more reliable for a mission requirement.

4DocumentRecord your evidence and decisions.

Record calculations, units, and a short claim-evidence-reasoning statement.

5ReviewCheck quality and identify your next step.

Your conclusion should consider both average performance and consistency.

Use these files and shared website resources when they support today’s work.

Use for graphs, calculations, motion diagrams, data displays, and design sketches.

Use for repeated trials, rover-distance data, timing data, accuracy measurements, and observations.

Templates, reference sheets, sketch paper, and course support files.