This program does nothing except what can already be done on the OS, but in a less user-friendly manor.
Usefulness: 0/10
You can do better in your head.
User-friendliness: 0/10
The built in functions are better. You even have to input the data in list format and it does not display the results in a useful manor.
Bugs: 10/10
It does work, as claimed.
Features: 0/10
The OS can give you all of the 1 variable statistics of a list, with better input and more output.
Overall: 10/40
I cannot see why anyone would need this program.