Statistics for Environmental Engineers

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1


1


1


1


1


-1 —


1


1


1


-1


-1


1


1


-1


1


-1


-1


1


-1


1


1


1 —


1


-1


-1


-1


1


1


-1


1


1


-1


1


-1


-1


1


The X’X matrix is:


8 0


0


0


0


О


О


0


0 8


0


0


0


О


О


0


О


О


8


0


0


О


О


0


X’X =


О


О


0


8


0


О


О


0


О


О


0


0


8


О


о


0


О


О


0


0


0


8 0


0


о


о


0


0


0


0 8


0


0 0


0


0


0


О


О


8

The inverse of the X’X matrix is called the variance-covariance matrix. It is:


1/8


0

Скачать в pdf «Statistics for Environmental Engineers»