winchester_royal Admittedly there may be other relevant variables that positively skew the relationship, but surely you must agree that there is some causality between possession? Even if it's as simplistic as more possession => more time with the ball => more opportunities to shoot.
Premier League this season:
Possession % per game:1 Swansea 59.5
2 Southampton 57.8
3 Manchester City 56.6
4 Arsenal 56.6
5 Everton 55.8
6 Tottenham 55.8
7 Liverpool 55.1
8 Manchester United 54.7
9 Chelsea 54.4
10 Newcastle United 48.6
11 Stoke 47.1
12 West Bromwich Albion 46.5
13 Fulham 46.4
14 Norwich 46
15 Sunderland 45.7
16 Cardiff 44.8
17 West Ham 43.8
18 Hull 43.3
19 Aston Villa 42.2
20 Crystal Palace 39.3
Shots per game1 Manchester City 17.7
2 Liverpool 16.7
3 Tottenham 16.4
4 Chelsea 16.1
5 Everton 15.7
6 Newcastle United 15.1
7 Arsenal 14.8
8 Southampton 13.4
9 Manchester United 13.2
10 Swansea 13.2
11 Norwich 12.9
12 West Bromwich Albion 12.3
13 Sunderland 12.3
14 Aston Villa 12.2
15 West Ham 12
16 Hull 11.5
17 Fulham 11.2
18 Crystal Palace 11.2
19 Stoke 11
20 Cardiff 10.7
If you separate teams into brackets of quality. i.e. accounting for the variable of quality then it becomes clearer imo.
If we say possession is the independent variable and shots per game is the dependent variable then for the bottom ten teams (in terms of possession) you get:
Stoke 11th
19th
West Bromwich Albion 12th
12th
Fulham 13th
17th
Norwich 14th
11th
Sunderland 15th
13th
Cardiff 16th
20th
West Ham 17th
15th
Hull 18th
16th
Aston Villa 19th
14th
Crystal Palace 20th
18th
tbh ^ that is a pretty weak correlation by the looks of it.
The two teams with the greatest amount of possession are Swansea and Southampton. But they're a fair way off the top 7 when it comes to shots per goals.
In fact, despite having so much more possession than all of the teams in the bottom half of the league they've not had many more shots.
Swansea vs Crystal Palace. An extreme possession discrepancy of 20.2%. That 20.2% has "caused" an extra 2 shots per game.
Like others have said, your graph's correlation is skewed massively by top teams behaving like top teams. That's not a model that Reading have much chance in following. We can't pay players £100K per week, and we can't spend £20 million on individual transfers.
We can try to follow the model of Southampton but let's not forget that their model is not easily replicable or cheap either. They've spent a shitload on transfer fees and they've got one of the best youth academies in the country. Can we compete on either counts.
Plus the Southampton model involves sacking Adkins, so all in all I'm not sure why all the Adkinistas are so cheery.