Test of Equality of Variances When testing two independent samples (for differences in mean, one-sided tests, etc.), it is helpful to know that the samples have equal variances or not.
JHK2303/iStock/Getty Images. Chambray, a double-ply cotton fabric with a tight weave, is similar to denim but not the same. It has a white filler thread woven in with a colored background thread. But unlike denim's twill weave, chambray has a plain weave, so it's smoother and lighter in weight.Chambray is rugged but light, making it suitable for work wear as well as summer-weight shirts and skirts.ut unlike denim's twill weave, chambray has a plain weave, so it's smoother and lighter in weight. Chambray is rugged but light, making it suitable for work wear as well as summer-weight shirts and skirts.
Like chambray, denim is made with a colored yarn in the warp and white in the weft, but is woven in a twill construction. The chambrayâs warp and weft threads will alternate one over the other, while denimâs warp thread will go over two threads in the weft before going under one.Typically, you will notice a lighter color to the underside of a denim fabric, whereas the underside of chambray will appear much more similar to its face side.heckout more Proper Cloth chambray and denim fabrics here. Chambray Shirting Fabric. Obviously, the denim that we are all most familiar with is the kind used to make jeans or 90âs style Jean Jackets. This denim is generally very heavy, and in most cases would not make for a comfortable shirt.