Ok, so here my thinking. Every team in the playoffs is much more motivated than they would be in the regular season, no matter what the series line, game, or situation, each game "should" bring the highest motivation out of a team.
So here's the playoff stats (these years are only ones at my disposal):
08: H goals/gm = 2.79
A goals/gm = 2.55
Difference = .24
09: H goals/gm = 2.95
A goals/gm = 2.53
Difference = .42
10: H goals/gm = 2.94
A goals/gm = 3.02
Difference = -.08
11: H goals/gm = 2.77
A goals/gm = 2.72
Difference = .05
12: H goals/gm = 2.34
A goals/gm = 2.44
Difference = -.10
So, I wanted to see how these playoff teams fared in the regular season, but to remove the variance of the "bad or non-playoff teams", I found the same stats as above, but only when any of the 16 playoff teams played each other, from Feb 1 and on (teams at the end of the year are playing more like they would be in the playoffs)
So here's the regular season stats of the playoff teams vs each other (was about 130 gms/year):
08: H goals/gm = 2.72
A goals/gm = 2.28
Difference = .44
09: H goals/gm = 3.06
A goals/gm = 2.71
Difference = .35
10: H goals/gm = 2.99
A goals/gm = 2.74
Difference = .25
11: H goals/gm = 2.62
A goals/gm = 2.78
Difference = .16
12: H goals/gm = 2.86
A goals/gm = 2.40
Difference = .46
So, comparing the difference in goals scored in regular season vs playoffs:
08: difference in goals decreased from .44 to .24 = .20
09: difference in goals increased from .35 to .42 = -.07
10: difference in goals decreased from .25 to -.08 = .33
11: difference in goals decreased from -.16 to .05 = .21
12: difference in goals decreased from .46 to -.10 = .56
which avg = .25 and median = .21. So am I way off, or onto something? That from my calculations, that the addition of a motivated team in the NHL is worth about .25 goals? Obviously other factors would contribute up or down, but I "think" this is a start.
Thoughts?