# Data matrix (multivariate statistics)

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Data matrix (multivariate statistics)

In multivariate statistics, a data matrix is a mathematical matrix of data whose rows represent different repetition of an experiment, and whose columns represent different types of datum (say, the results from a particular probe). For example, suppose an experiment is run where 10 people are pulled off the street and asked four questions. The data matrix M would be a 10x4 matrix. The datum in row i and column j of this matrix would be the answer of the i-th person to the j-th question.

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