Runs means runs scored. Every time a player scores, by touching home plate, he is credited with a run.
Runs batted in and on base percentage.
Batted in, but its normally RBI - Runs Batted In
Runs
I do not believe there is an "RE" statistic in baseball. There is an "ER" stats and that refers to "Earned Runs".
No such category in baseball.
Statistics, or stats, is data. Usually numbers. For example, stats are common in sports. Some statistics in baseball are: games, attendance, home runs, strikeouts, double plays, etc.
team
Batters Faced.
Position
caught stealing
Offensive Errors
Stolen bases.