P50, P95, P99 & Variance

The record from last lesson ends with a rule about order: keep the raw per-request data, because summaries come last. This lesson is the summarizing. The 199 kept requests of the course capture become the handful of numbers a report can print, and the machinery for that comes from sampling and statistics, which built percentiles on twenty synthetic timings and…

In this lesson

• The report grid
• The shape behind each row
• Tail exposure
• Population choices
• Sample size and run planning

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