Variance is a statistical measure which tells us how measured data vary from the average value of the set of data.
2. pertaining to or located near the sciatic nerve or vein. sciatic nerve a nerve extending from the base of the spine down the thigh, with branches throughout the lower leg and foot; it is the widest nerve of the body and one of the longest. sciatica is pain or inflammation along the course of this nerve. See anatomic Table of Nerves in the Appendices and see Plates.
The sciatic nerve is the largest and longest nerve in the body. It runs from the lower back region through the buttock and continues down the back of the leg. The sciatic nerve controls the movement of many muscles in the thigh and leg as well as provides a means of sensory input to the brain.