Load Testing · Middle · Question 55 of 76
Why is standard deviation a weak summary for latency?
- 1It is always zero for HTTP requests
- 2Latency has a long tail and isn't normally distributed
- 3Standard deviation can't be computed for time values
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Correct answer: Latency has a long tail and isn't normally distributed
Explanation
Latency has a hard lower limit and a long right tail. Percentiles describe it better than mean ± standard deviation.