It checks if the numeric value of a field lies outside of the limits calculated from the mean and standard deviation at that node.

The figure shows the field, Call Duration, from the 'Telephone Calls' example mapped using Test Outside Mean/SD. Records are counted to 'True' if they lie outside of a range formed by mean plus or minus 3 standard deviations..

This is a very powerful mapping format and has lots of applications in such things as scientific analysis, money laundering detection and performance management.

See Test Outside Mean/SD in the Help for more details.