An AR model is said to have order d+1 if it expresses the current and d previous values as a function of the d+1 previous values.
(Kelly's character, a fashion model, was said to have been inspired by Mr. Hayes's wife, Mildred, also a model).
"This is testimony to how strong and unique their business model is," said David Readerman, a partner and director of growth equity strategy at Thomas Weisel Partners, the San Francisco-based investment firm.
"The degree of fragmentation of care also limits how generalizable this model is," said Dr. Hoangmai H. Pham, a senior researcher at the Center for Studying Health System Change, a nonprofit group in Washington.
Such a model is said to be observation driven.
The model is said to "learn" or to "be trained".
If the normality test is not satisfied, the model is said to fit the data poorly.
Instead if there are no compatible solutions, the model is said to be overidentified.
The signal model is said to be MIMO for multiple input multiple output.
Each model is said to conform to its metamodel at a higher definition level.
