Added by Linda Tschudin on August 27, 1999 at 10:59:49:
Average value = measured values added together then divided by how many values there are.
Deviations= measured values subtracted from Average value.
Average deviation= deviation values added together and divided by number of deviations involved. Then, place a -+ along with that number to the right of the average value.
Average deviation= 10.041 -+0.01