curve of "number of samples"

[electronics20]

dear scholars
How to achieve curve of "number of samples" versus, for instance, current in Monte-Carlo method and simulation for a simple MOS circuit? thanks for your helps.

 

[crutschow]

What simulator are you using and what parameter besides current is varying?

 

[electronics20]

What simulator are you using and what parameter besides current is varying?

My simulator is HSPICE, and another variable parameter is threshold voltage of all transistor having normal distribution. thanks again.