Be sure that Minitab knows where to find your downloaded macro. Choose . Under Macro location browse to the location where you save macro files.
If you use an older web browser, when you click the Download button, the file may open in Quicktime, which shares the .mac file extension with Minitab macros. To save the macro, right-click the Download button and choose Save target as.
Suppose your data are in C1. To run the macro, choose and type:
%MEDABSDV C1
Click Run.
Formula
MEDABSDV = bn*1.4826*MEDIAN{abs[C - MEDIAN(C)]}
Where 1.4826 makes the expected value of MEDABSDV = STDEV(Normal population) and bn is a finite sample corrrection factor.
Reference
C. Croux and P. J. Rousseeuw, Time-efficient Algorithms for Two Highly Robust Estimators of Scale, Computational Statistics, v. 2, 411-428, (1992).