IWT      Kb = 6      mid-point estimators
P δ Dsig Dsig Dref Dref
50.52341.52256.0
40.5573.5552.085.564.0
30.5137.5132.021.516.0
20.531.530.05.54.0
10.56.56.01.51.0
00.01.01.00.50.5