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.
Best Answer: Sciatica is an inflammation of the sciatic nerve, the body's longest nerve that runs from the base of the spine (sacral plexus) down through the thigh, leg and foot with various branches off it. It usually presents with pain and tenderness along the course of the nerve down the back of the leg and thigh into the sole of the foot.