The numbers displayed here are the base values for the skills. Magicka/Stamina Cost is based on a character of Level 4, wherein each additional level increases the Magicka/Stamina Cost by 10% of this value. Damage values are based on Max Magicka/Stamina 1000, and Weapon/Spell Damage 0. The actual numbers you see in the game may depend on a variety of factors, including skill line rank, your equipped weapons and armor, other skills, enchantments, etc. As such, they should only be used as a comparative reference.