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Inversion of Matrix

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     Date:13/12/2023          23UCM004                          Inverse of Matrix The inverse of a square Matrix A is denoted by A-1 . A -1 is unique. A-1 exists if and only if  A is non singular. |A| ≠ 0. Formula: A.              -1 =      1 |𝐴| (𝑎𝑑𝑗 𝐴). The inverse of a square Matrix A is deno      The inverse of a matrix is another matrix that, when multiplied by the given matrix, yields the multiplicative identity. For a matrix A, its inverse is A - 1 . And  A.A - 1  = I , where I is denoted as the identity matrix.             In order to find the inverse matrix, the square matrix must be non-singular and have a determinant value that is not zero. Let us consider a 2×2 square matrix A. The  determinant  of matrix A is denoted as  ad-bc , and the value ...
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I B.Com unit 3 SAMPLING TECHNIQUES

                    1th year l B.Com                             Unit 3                    Sampling techniques It is important to carefully define your target population according to the purpose and practicalities of your project. If the population is very large, demographically mixed, and geographically dispersed, it might be difficult to gain access to a representative sample. A lack of a representative sample affects the validity of your results, and can lead to several research biases, particularly sampling bias. Sampling frame The sampling frame is the actual list of individuals that the sample will be drawn from. Ideally, it should include the entire target population (and nobody who is not part of that population). Example: Sampling frame You are doing research on working conditions at a social media marketing co...
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