Talk:Factor analysis

Bass-Ackwards analysis
There is a form of factor analysis that has not been mentioned in this article which is useful.


 * https://www.sciencedirect.com/science/article/abs/pii/S0092656606000134
 * https://experts.umn.edu/en/publications/a-general-method-for-computing-hierarchical-component-structures-
 * https://www.infona.pl/resource/bwmeta1.element.elsevier-101f4492-b753-35d3-898f-f6efcda2d8f3
 * Possible Utility https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5216419/ — Preceding unsigned comment added by 14.136.243.17 (talk) 11:06, 2 December 2021 (UTC)

Independence v.s. Orthogonality
In section "Mathematical model of the same example" the text says:

The errors are assumed to be independent of the factors:

$$\sum_i F_{pi}\varepsilon_{ai}=0 $$

I don't understand how this is an assumption. The equation seems as if factors and errors were orthogonal by construction. As an assumption I would have expected an expected value on the left hand side. Matze-pigon (talk) 18:39, 27 February 2023 (UTC)