The following are daily returns for the Dow Jones Industrial average during the week of October 13. The returns are rounded to the nearest whole number. 
(See the Excel Data File.)
A) Calculate the arithmetic mean return.
B) Calculate the geometric mean return.
Definitions:
Reverse Peristalsis
The backward movement of the contents of the digestive tract, which can lead to vomiting, as a result of the muscles contracting in the opposite direction of normal digestion.
Secretin
A hormone produced by the duodenum that stimulates the pancreas to release bicarbonate-rich fluids to neutralize stomach acid.
Gastrin
A hormone produced by the stomach that stimulates the secretion of gastric acid.
CCK
Cholecystokinin, a hormone that stimulates the digestion of fats and proteins by promoting the release of digestive enzymes and bile from the pancreas and gallbladder.
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