Ripley's K Confidence Envelope doesn't follow the blue expected line

Discussion created by maryice on Sep 15, 2011
Latest reply on Oct 17, 2012 by anewlander
I'm working for the first time with the Spatial Statistics tools.
I have point data of birds on an island. I want to calculate the K-Function, but the result graph always shows a Confidence Envelope that is under the blue expected line. Why is that? Shouldn't the confidence envelope follow the expected line?
I would be glad if anyone had a suggestion what mistake I might have made here.