hard20 pts · first answer countsperformance-testingpercentilesperformance-metrics

Mean plus two standard deviations

Latency samples have mean 300 ms and standard deviation 400 ms. A report says "95% of requests are within mean ± 2 SD, i.e. −500 ms to 1,100 ms". What is wrong?

A.Nothing; this is the correct way to report latencyB.The standard deviation must always be smaller than the meanC.The mean should be replaced with the maximumD.Latency is skewed, not normal, so use percentiles instead

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Mean plus two standard deviations

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