Plastic sheets data

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 T²-Generalized Variance Chart.

Worksheet column Description
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