Hi Nnaemeka,
The ability to conduct sensitivty analyses is not natively built into LEAP. However, using LEAP's API (application programming interface) you may run the software iteratively with an ensemble of different inputs to generate an array of results, and perform whichever statistical analysis you desire on those outputs. This can be accomplished using Crystal Ball (there are some threads in the LEAP support forum on this topic which you may search) or with a custom utility, if you wish.
Here are two related threads:
https://www.energycommunity.org/default.asp?action=9&tid=3372&fid=22
https://www.energycommunity.org/default.asp?action=9&tid=2781&fid=22
Hope this helps,
Taylor