Enemy and Stat Generation... is their an easy way?

So far I’m creating an enum like Creature Class (1,2,3)
and using random.range to randomly choose one and…
creating a function so that…

if Creature class = 2 
{
       health = random.range (1 -5) x playerLevel ;
       attack = random.range ( 2 - 4) x playerLevel;
}

is their an easier way to attach stat values like health = (specific amount) to the creature class (2), etc?

There are many ways. One way is to use an array:

 int[] healths = new int[]{ 50, 100, 250 };

 health = healths[(int)creatureClass];