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st: % of variance in factor analysis


From   Mash Hamid <MXH191@bham.ac.uk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: % of variance in factor analysis
Date   Thu, 30 May 2013 00:38:51 +0000

Hi,


I have been performing factor analysis and I am having trouble understanding the % of variance and to explain it in layman's terms.


I have a dataset with 40 variables and the first factor has an eigenvalue of 13 and the second factor has an eigenvalue of 2. Now the first factor accounts for  40% of the variance, and the second has variance of 8% after rotation. Now in layman's terms, what does  "% of the variance of each factor" mean?


Thanks

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