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.
error (of measurement) [VIM 3.10] - result of a measurement minus a true value of the measurand (which is never known exactly); sometimes referred to as the absolute error to distinguish from relative error [ISO, 34].