Question: If X is a matrix of centered data with a column for each field in the data and a row for each sample, how can

If X is a matrix of centered data with a column for each field in the data and a row for each sample, how can we use matrix operations to compute the covariance matrix of the variables in the data, up to a scalar multiple? Question 1 options: a) X T * X b) X * X T c) X - 1 d) X T * X - 1 X T e) X + X T

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