A quality engineer wants to monitor the variability in the tear strength, glossiness, and opacity of plastic sheets that her company manufactures. She measures four sheets a day for 10 days. Previous analyses have found that these variables are correlated.
Because this data contains three dependent measurement variables, you can use it to demonstrate Tsquared-Generalized Variance Chart.
|Subgroup||The subgroup identifier|
|Tear||The tear resistance of the plastic sheet|
|Gloss||The glossiness of the plastic sheet|
|Opacity||The opacity of the plastic sheet|