=+5.65 ● In the study of textiles and fabrics, the strength of a fabric is a very important consideration. Suppose that a significant number of swatches of a certain fabric are subjected to different “loads” or forces applied to the fabric.

The data from such an experiment might look as follows:

Hypothetical Data on Fabric Strength Load

(lb/sq in.) 5 15 35 50 70 80 90 Proportion failing 0.02 0.04 0.20 0.23 0.32 0.34 0.43