Private Real Estate Investment - Part II: Risk Analysis by Brown Dr. Roger J

Author:Brown, Dr. Roger J [Brown, Dr. Roger J]
Language: eng
Format: epub
Publisher: IMOJIM, Incorporated
Published: 2012-06-23T16:00:00+00:00

Finally, the lower right element in the X T X matrix, the sum of the square of the size of each house, is the coefficient of b in equation (7.14) .

Inserting the values we have found for the terms in equations (7.15) and (7.16 ) produce two equations in two unknowns.

These can be combined into a pair of equations using Mathematica ’s Solve function to find the values for the a and b unknowns.

Students are often confused by the different notation styles used to present equations and mathematical identities. One usually learns algebra and its symbols and then “graduates” to matrix algebra and its notation form. In time one recognizes the similarities between the two styles and moves easily between them. Until that time one may endure much frustration.

For instance, the regression equation may be expressed in matrix notation as

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