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Apr 27, 2016 at 17:30 vote accept Abhinav Gupta
Apr 27, 2016 at 16:18 comment added ttnphns These are not unique variances in the formulas, but the (unknown) unique variables themselves. See explanation of the factor model: stats.stackexchange.com/a/94104/3277
Apr 27, 2016 at 16:11 answer added Jeremy Miles timeline score: 1
Apr 27, 2016 at 15:11 history asked Abhinav Gupta CC BY-SA 3.0