Hand and Foot Modifier FA -F9 and T1 - T9. E1 - E4, FA - F9, TA - T9 Level II Modifier. E1-E4 Anatomic modifiers which are associated with the eyelid. FA, F1- F9 Anatomic modifiers which are associated with the fingers. TA, T1- T9 Anatomic modifiers which are associated with the toes.
X-bar and R Control Chart Issues and Resolution. X-bar and R control charts are used in quality control to identify when special cause or out-of-control conditions occur in time-series data so that timely corrective actions can be taken to resolve problems.
In a bar chart the length of the bar indicates the size of the category, but in a histogram it is the area of the bar that is proportional to the size of the category. This difference is due to the fact that in a histogram both the x-axis and y-axis have a scale, whereas in a bar chart only the y-axis has a scale.