Calculating MCS Index

[Piotr Djaków]

Hello

I've try to calculate MCS Index based on:
http://rammb.cira.colostate.edu/projects/MCSIndex/mcsindexdescription.htm

and i have one problem with:

 "where each term (i.e., lifted index (LI), 0-3 km shear, and 700 mb
temperature advection) is normalized by subtracting the MCS sample
mean and dividing by the sample standard deviation.".

I think that my english is to weak and i don't understand that...
Can you tell my what i must do?


Best Regards
Piotr Djakow