We have to check monthly reports for server response time on Analytics, and I noticed something that makes very little sense to me.
When looking at a monthly report for last month (April 2017), we get a server response time of 2.10 secs, due to a spike from a single user. When looking at that same month on the spectrum of the site's entire life (from Jan 2014 to May 2017) April 2017 is displayed as 1.17secs.
In fact, looking at a 4 year spectrum, the values look different all around.
What exactly should I trust on the server response time calculation? Can anyone explain to me how they calculate these values and why they would be different depending on the time period we extrapolate them from?