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 a large nerve that begins in the lower back and runs through the buttocks and down the leg. Its origin is near the sacral plexus, and its distal end divides into the tibial nerve and the common fibular nerve.