Results of the research.You will find the link to the webpage with regrssion graphs and data that define the relation between game shape variation and minutes played in a week by a player.
The study was performed with the data of 54 users and their 743 players, the software used for the analisys is statview.
As you can see on the graph (simple regression) and on the sheets, the relationship between the two variables is not so high (0,42), but statistically significative (p<0,0001).
The best category reslts the one from 45 to 70 minutes, or better from 50 to 65; most of +1 and +2 is around the 60 minutes value. However, looking at the Gauss lowess you can see that mean best value for 60 minutes is under +1...so if your player take +2 you are quite lucky.
Categories from 30 to 45 minutes and from 75 to 90 minutes have different results: everything could happen in those categories, but the more players go toward 60 minutes value, the more they could increase their game shape.
Moreover data confirm that is no good for a player to play less than 24 minutes and overall more than 96 minutes. Under 5 minutes and over 105 -2 in game shape is sure!
Descriptive data and graphs are linked if you want...
Limitations of this research:
734 players are few for this kind of research ...sample should be larger.
Dependent variable (game shape variation) is not really continuuos (it can be only -2,-1,0,+1,+2)
I made my last stat exam 2 years ago....so... :-)
http://img341.imageshack.us/my.php?image=varformaxminutes...http://img167.imageshack.us/my.php?image=relationbetweeng...http://img177.imageshack.us/my.php?image=graficidescritti...http://img232.imageshack.us/my.php?image=descriptivedataw...bye!