Continuous Model Selection Matrix ================================= Uniform: bounded, equal density by mechanism. Normal: stable, roughly symmetric measurement with tapering tails. Exponential: nonnegative waiting time between independent constant-rate events. Triangular: bounded what-if scenario with a defensible most-likely value. No model: evidence insufficient or assumptions materially fail. 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.