Question: Let X = [ x(1) . . . x(n)]T be an N D dimensional matrix. What is the variance of the points Sn = {

Let X = [ x(1) . . . x(n)]T be an N D dimensional matrix. What is the variance of the points Sn = { x(i)}n i=1 after each is projected onto the unit vector u, given that the mean of dataset Sn is 0? Your answer should depend only on X, u, and n

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