My boss wants availability graphs. I told him that would be easy enough to provide but when I started looking closely I started seeing discrepancies. The one that gives me the most problems is that the 95th percentile for availability always seems to show 100%. The most obvious example that I could find is below. As you can see none of the data points has a value greater than 50% but the 95th percentile shows availability to be 100%. Why?
This data is from October so it has already been summarized. I'm not having an issue with the summarization of the data just the 95th percentile calculation.