On the website ArcGIS Help 10.1 is the formula of z-score of Anselin Local Moran's I. Why are E[I] and E[I2] calculated like that?
Although in "Mitchell, Andy. The ESRI Guide to GIS Analysis, Volume 2. ESRI Press, 2005" has the same formula of E[I], but there is nothing about E[I2].
Why is the E[I] not the average of neighbor's I even with an exact search radius? Why is V[I] not just the Standard Deviation of neighbor's I?
Attached is the formula of z-score.