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Evaluation engineering and statistical evidence
Compare systems without averaging away serious failures.
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Evaluation engineering and statistical evidence
Compare systems without averaging away serious failures.
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Source-based teaching example · Fictional data · Reviewed 2026-10-03. Microsoft Mark · locally synthesized. On a small screen, use fullscreen for diagram details or read the transcript.
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0:00 · What you will learn
Compare systems without averaging away serious failures.
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Compare systems without averaging away serious failures.
0:06 · The idea
Compare the same cases using aligned IDs. Report important groups separately. A statistical interval does not settle permission questions or every source of uncertainty.
What appears on screen
Compare the same cases using aligned IDs. Report important groups separately. A statistical interval does not settle permission questions or every source of uncertainty.
0:20 · One useful term
Paired comparison. Testing two systems on corresponding versions of the same cases.
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Testing two systems on corresponding versions of the same cases.
0:29 · A worked example
In the larger made-up comparison, routine cases improve but two critical disclosures appear. The release decision is still no-go. A positive overall difference can hide a serious new failure.
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In the larger made-up comparison, routine cases improve but two critical disclosures appear. The release decision is still no-go. A positive overall difference can hide a serious new failure.
0:44 · Your turn to think
Can better average performance cancel a critical disclosure? Pause and decide before continuing.
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Can better average performance cancel a critical disclosure? Pause the video if you need more time.
1:01 · Why this answer works
No. Apply the critical rule separately. If case IDs do not align, stop the comparison before scoring.
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No. Apply the critical rule separately. If case IDs do not align, stop the comparison before scoring.
1:12 · Check 1
Align case IDs before calculating.
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Align case IDs before calculating.
1:17 · Check 2
Report critical failures separately.
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Report critical failures separately.
1:22 · Check 3
State the sampling assumptions and limits.
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State the sampling assumptions and limits.
1:28 · Now try a different case
Open the lesson and try its different practice case. Use every check in the full task. Watching alone does not mark the lesson complete.
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Open the lesson Try the new case Check and revise The full task and its requirements are in the linked lesson.
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