In professional sports, a franchise player is an athlete who is not simply the best player on their team, but a player that the team can build their franchise (team) around for the foreseeable future.
The standard error is the estimated standard deviation or measure of variability in the sampling distribution of a statistic. A low standard error means there is relatively less spread in the sampling distribution.
Definition of error 1 a: an act or condition of ignorant or imprudent deviation from a code of behavior b: an act involving an unintentional deviation from truth or accuracy