Coverage changes the portion of data points covered by the ellipsoid. The larger the value, the bigger the ellipsoid.
Transparency changes the surface of the ellipsoid from transparent to opaque. The larger the value, the more opaque the ellipsoid.
You display and remove normal contour ellipsoids by selecting and deselecting Normal Contour Ellipsoids from the red triangle menu.
The examples in this section use the sample data table, which includes measurements of sepal length, sepal width, petal length, and petal width for three species of iris.
Related Information 

Help created on 9/19/2017