Give an example of a non-zero 2 × 2 matrix R which satisfics R² = 0. Suppose that M is an n x n matrix satisfying M³ = 0. Show that (I – M)-1 (I+M + M²). Since R2 = 0 implies R* = 0, use the previous part to find the inverse of (I – R).

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.