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From Oliver Lloyd <oliver_ll...@hotmail.com>
Subject Re: Jmeter Deviation
Date Sun, 04 Sep 2011 10:52:41 GMT
For the thread. I ran through some tests on this and for V2.4.20110513 I get
consistent and accurate results for stdev. and avg. across all relevant
listeners.

The Test:
One thread group using a single dummy sampler. Run with two threads each
making 2 iterations.

Results:
Response Times
1. 833
2. 410
3. 597
4. 98

JMeter Listeners
Aggregate Report Avg. - 484
Aggregate Graph Avg. - 484
View Results in Table Avg. - 484
View Results in Table Stdev. - 268
Summary Report Avg. - 484
Summary Report Stdev. - 268.81

Open Office
stdevp() - 268.81
average() - 484

Conclusion:
V2.4 of JMeter correctly calculates both average and standard deviation
values.

The only potential bug here is that the stdev value for the View Results in
Table listener does not get rounded up (268.81 is displayed as 268 and not
269).

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