rosson1:but if i (often) shoot a 2 over par i go out in my avg 0.9. But if i shoot 2 under (0n a 36 course) i don't move at all...so there is no reward for breaking par ever so slightly but a huge toll if i miss par by 2 shots...and yes, i wish i could not miss par by even one shot :))
Preliminary note: Don't refer to scores as +/- Par when talking about average calculation. It's all about gross scores, 33, 68, whatever.
Your ave. is 68.38, you played short of 100 ranked rounds as a Legend. Thus, your average will move on every result.
Alas, scoring +2 on 9 holes Par 36 is a 76 (= 2 x 38) which will move the average by about (76-68.4)/100 = .08.
Scoring -2 on 9 holes Par 36 is 68 (= 2 x 34) which is so close to your average that the move may be invisible.
BTW: The correct way to calculate the floating average is via the total no. of ball hits:
a1 = (a0 * n0 + s)/(n0+1)
a0 = old average, a1 = new average
n0 = no. of rounds corresponding to a0
s = score of the new round.
With the numbers of the first example:
(68.38 * 100 + 76) / 101 = 6914 / 101 = 68,46
(a move of .08)