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.
Sciatica means inflammation of the sciatic nerve. The sciatic nerve is the largest nerve in the body and runs from the lower lumbar spine down the back of the leg to the foot. Irritation of this nerve is often caused by a vertebral disc bulging or herniating.ciatica means inflammation of the sciatic nerve. The sciatic nerve is the largest nerve in the body and runs from the lower lumbar spine down the back of the leg to the foot. Irritation of this nerve is often caused by a vertebral disc bulging or herniating.