APPENDIX B: Standard Deviation
The formula of standard deviation is listed below:
 
    n is the sample count,  is the mean value of the sample count.
 is the mean value of the sample count.
Here is an example of standard deviation calculation.
Total 4 latency counts, 4, 4, 6, 6. n is 4 , the mean value is 5. The standard deviation value is 1.
