Almost all of the students' scores are below the average. Therefore, in this case the mean is not a good representative of the central tendency of this sample. The median, on the other hand, is the value which is such that half the scores are above it and half the scores below. So in this example, the median is 8. There are four scores below and four above the value 8. So 8 represents the mid point or the central tendency of the sample.
Definition of duct. 1 : a bodily tube or vessel especially when carrying the secretion of a gland. 2a : a pipe, tube, or channel that conveys a substanceb : a pipe or tubular runway for carrying an electric power line, telephone cables, or other conductors.
Instead of carrying bile, the pancreatic duct carries the fluid containing the digestive enzymes produced by the acinar cells (exocrine cells) of the pancreas. The main pancreatic duct is normally only one-sixteenth of an inch in diameter and it has many small side branches. The main pancreatic duct merges with the bile duct in the head of the pancreas to form the ampulla of Vater (a widening of the duct just before it enters the duodenum). Just as was true for bile, the flow of pancreatic fluid is often blocked by tumors of the pancreas, and altered by pancreatic surgery.