Point buy option:

At your Dungeon Master's option, you can use this variant for determining your ability scores. The method described here allows you to build a character with a set of ability scores you choose individually. 

You have 27 points to spend on your ability scores. The cost of each score is shown on the Ability Score Point Cost table. 

For example, a score of 14 costs 7 points. Using this method, 15 is the highest ability score you can end up with, before applying racial increases. You can't have a score lower than 8. [b]This method of determining ability scores enables you to create a set of three high numbers and three low ones (15, 15, 15, 8, 8, 8), a set of numbers that are above[/b]


You can See the point cost table on page 14 in the PDF, because as mentioned, 16 on all stats is complete bullshit