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Year: 2010

Arithmetic Mean, Variance and Standard Deviation of a Random Variable Distribution

Arithmetic Mean, Variance and Standard Deviation of a Random Variable Distribution

Suppose the random variable distribution of a random variable X is as follows: X = xi P(x = xi) x1 x2 x3 . . . xn P1 P2 P3 . . . Pn Then, Arithmetic Mean μ = Variance σ2 = Standard Deviation σ =
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Epson Launches New Stylus Pro 4900 – For the Photography and Fine Art Market

Epson Launches New Stylus Pro 4900 – For the Photography and Fine Art Market

As you may already know Photokina 2010 has started yesterday September 21 and will last till 26. It is the world’s leading fair for photography and imaging industries held at Cologne Trade Fair, Germany every 2 years where new products, trends and the world’s leading brands …
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Inverse of a Matrix

Inverse of a Matrix

Inverse of a Matrix Suppose A is a given matrix. If there exists a matrix B such that, AB = I = BI then A is said to be an invertible matrix and B is called as inverse of A and is denoted by Note:- If …
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Define Adjoint of a Matrix

Define Adjoint of a Matrix

Adjoint of a Matrix If A is a square matrix then the transpose of a matrix obtained by replacing the elements of A by their co-factors is called the adjoint of a matrix A and is denoted by Adj A. For example, Note If A is …
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What is a Potentiometer

What is a Potentiometer

Potentiometer A Potentiometer is a electrical device used to measure unknown voltage by comparing it with a known voltage. It comprises of a slide wire of uniform cross-section and hence uniform resistance along its length. A calibrated scaling cm and fraction of cm is placed along …
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