All Data

Select this option to have statistics calculated from all data points.

Data in Viewed Range

Select this option to have statistics recalculated as soon as the currently viewed time axis changes.

Control Chart (Data Set)

Select this option to display a control chart based on a target and/or a first standard deviation (1s) value that you enter on the Trend Decoration: Data Set tab page. This option is useful when you have previously determined a target and/or a 1s value from an existing set of data.

Mean or Target

Displays a horizontal line at the Target value. Target is determined by the selected Calculated From option. If All Data or Data in Viewed Range is selected, Target is the mean of either all the data values or of the data values in the viewed range. If Control Chart (Data Set) is selected, Target is the value entered on the Trend Decoration: Data Set tab page. The line is labeled Target (All/Viewed/X-Chart:x), where x is the Target value.

1s (Mean or Target +/- 1 Std. Deviation)

Displays two horizontal lines at the 1s level of significance (i.e., where there is a probability of 68.3% that a trend point will fall within the two lines). 1s is calculated based on the selected Calculated From option:

• If All Data or Data in Viewed Range is selected, 1s is calculated from either all of the trend values or from the trend values in the viewed range.

• If Control Chart (Data Set) is selected, 1s is the value entered on the Trend Decoration: Data Set tab page.

The lines are located at Target +/- 1 Standard Deviation and are labeled 1s(All/Viewed/X-Chart:x), where x is the value of the respective line.

2s (Mean or Target +/- 2 Std. Deviations):

Displays two horizontal lines at the 2s level of significance (i.e., where there is a probability of 95.5% that a trend point will fall within the two lines). 2s is calculated based on the selected Calculated From option:

• If All Data or Data in Viewed Range is selected, 2s is calculated from either all of the trend values or from the trend values in the viewed range.

• If Control Chart (Data Set) is selected, 2s is calculated from the 1s value entered on the Trend Decoration: Data Set tab page.

The lines are located at Target +/- 2 Standard Deviations and are labeled 2s(All/Viewed/X-Chart:x), where x is the value of the respective line.

3s (Mean or Target +/- 3 Std. Deviations):

Displays two horizontal lines at the 3s level of significance (i.e., where there is a probability of 99.7% that a trend point will fall within the two lines). 3s is calculated and the lines are labeled in the same way the 2s lines are calculated and labeled (as described above).