Jack of all Trades is half your proficiency bonus, or +1)
(Wow, proficiencies have changed. So basically, the +4 is +2 from skill, +2 from stat? So rather than +4 w/say stealth and sleight-of-hand, I'm at a +3? I suppose I should have realized it couldn't be the case. Even by the old method it was half of a players level rounded down. Can't help it, I always try to eke out extra advantages ๐๐).