Calculate the standard deviation of CICO response times

The standard deviation can help to show how the response times of check in/out transactions are distributed, which is useful for analysis as we need to know which are the outlier response times to discard and which ones to keep.  

Calculate the standard deviation of the overall check in and check out response times  ("overall response time = check in or check out JMeter controller time).  Run 10 CICO tests of 8 and 20 users separately (20 in total) and record 95%th response times. Use these data to feed into the standard deviation formula. 

Acceptance criteria:

• Create a Confluence doc that defines the mathematical formula of std. 

• Report shows the distribution of the response times. and a graph (or chart) showing the bell curve and distributions.