The present meta-analysis compared the effect of exercise-only with exercise-diet interventions on plasma glucose levels among a pre-diabetic population.

This paper establishes a criterion that measures approximately the average net income of a process under surveillance of an X̄ chart when the process is subject to random shifts in the process mean.

Control charts usually present a graphic display of process stability and/or instability with time, from which the you can determine mean and standard deviation.