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I am doing a PCA and I am analyzing 15 performance variables. All of these variables are measured from a scale of 1-5 (1 very dissatisfied, 5 very satisfied).

Do I need to standardize the data for analysis? Can I just use the original data / mean-corrected data for analysis?

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  • $\begingroup$ Yes but many tools (sklearn) will do this for you. $\endgroup$ – Chris Dec 4 '18 at 2:16
  • $\begingroup$ Please register &/or merge your accounts (you can find information on how to do this in the My Account section of our help center), then you will be able to edit & comment on your own question. $\endgroup$ – gung - Reinstate Monica Dec 4 '18 at 2:37

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