The stats appeared with the apocalypse and was giving to every human.
This is an average human stats.
Name.
Age.
Race: Human.
Level: 1.
Job. (Volume 0 Chapter 4.)
Second job: None.
Power: 100.
Speed: 20.
Intelligence: 10.
Magic Power(MP): 2000+200(since every point in Intelligence can increase the magic power by 1 percent.)
Skills. (Volume 0 Chapter 2.)
Magic. (Volume 0 Chapter 3.)
And the stats can vary from one human to another, for example, the power will not be the same for a trained human and regular human. The speed of a runner is not the same as the speed of a taxi driver.
The same thing goes for Intelligence.
But the Magic Power doesn't have a thing with your training it is something like a talent that is why even though there are humans with less than 1000 MP there are others with more than 30000 MP at level 1.
And humans can level-up by killing monsters and even killing fellow humans.
With every increase by 1 level, the stats will rose the same for every human no matter their original stats that they were given from the beginning.
Every 1 level:
Power will increase by 10.
Speed will increase by 5.
Magic Power(MP) will increase by 1000.
And every 10 levels Intelligence will increase by 1.