machine learning algorithms build a mathematical model of sample data, known as &"training data&", in order to make predictions or decisions without being explicitly programmed to perform the task.
---focus of designing algorithms that can learn from and make predictions on the data without being explicitly programmed to perform the task  --- &"training data&"
The Nikkei average .N225 was down 1.83 percent or 192.25 points at 10,310.04 , its lowest close since August 28 .