A data frame with the following fields: school, home_game,
away_game, runs_scored_home, runs_allowed_home, run_scored_away,
runs_allowed_away, base_pf (base park factor), home_game_adj (an adjustment for the percentage of home games played) final_pf (park factor after adjustments)
| col_name | types |
| school | character |
| home_game | numeric |
| away_game | numeric |
| runs_scored_home | numeric |
| runs_allowed_home | numeric |
| runs_scored_away | numeric |
| runs_allowed_away | numeric |
| base_pf | numeric |
| home_game_adj | numeric |
| final_pf | numeric |