Statistic fun with new coaches!

There have been 127 coaching changes since 2001. 64 resulted in some improvement; 49 teams lost more than the year before; and 14 won the same number of games. Of those teams that improved, seven resulted in a six wins or more improvement. Overall, new coaches average .22 more wins in their first season than their predecessors. So for those predicting that SMU is going bowling, you might reconsider given how rare such a dramatic improvement is.
But then, I haven't mentioned the rather odd statistical anomaly....
Of the teams with a new coach following a one-win season, those teams averaged a whopping 4.28 win improvement the next season. That is right; one win teams that make a coaching change average five wins the next season. Also, of the seven one-win teams that hired new coaches since 2001, all improved by at least one game. Of those seven one-win teams, a majority (four) finished with winning records.
Here are the numbers:
# Wins: Improvement
0 Wins: 1.25
1 Win: 4.28
2 Wins: 2.29
3 Wins: -.57
4 Wins: .43
5 Wins: 1.23
6 Wins: -.54
Others: -1.28
Make of this what you will.
But then, I haven't mentioned the rather odd statistical anomaly....
Of the teams with a new coach following a one-win season, those teams averaged a whopping 4.28 win improvement the next season. That is right; one win teams that make a coaching change average five wins the next season. Also, of the seven one-win teams that hired new coaches since 2001, all improved by at least one game. Of those seven one-win teams, a majority (four) finished with winning records.
Here are the numbers:
# Wins: Improvement
0 Wins: 1.25
1 Win: 4.28
2 Wins: 2.29
3 Wins: -.57
4 Wins: .43
5 Wins: 1.23
6 Wins: -.54
Others: -1.28
Make of this what you will.