Normal Model Checklist
======================

Process: stable measurement mechanism?
Support: are impossible values negligible?
Shape: one centre, approximate symmetry, tapering tails?
Diagnostics: histogram and QQ plot consistent?
Decision: is the relevant tail adequate?
Sensitivity: does an alternative change the recommendation?

Original synthetic data generated for STATLAB Academy. No textbook data used.
Educational material for STATLAB Academy. Verify assumptions, units, tail direction, and rounding before making a decision.