Jämför metoder

	Faktoriell analys	K-Närmaste Grannar	Multivariat variansanalys (MANOVA)
Ämnesområde	Forskningsstatistik	Maskininlärning	Statistik
Familj	Process / pipeline	Machine learning	Hypothesis test
Ursprungsår	1931	1967	1932
Upphovsperson	Louis Leon Thurstone	Cover, T.M. & Hart, P.E.	Samuel Stanley Wilks (Wilks' Lambda, 1932); Roy, Hotelling, Pillai (mid-20th c.)
Typ	Method	Instance-based (non-parametric) learning	Parametric multivariate mean comparison
Ursprungskälla	Thurstone, L. L. (1947). Multiple Factor Analysis. University of Chicago Press.	Cover, T.M. & Hart, P.E. (1967). Nearest Neighbor Pattern Classification. IEEE Transactions on Information Theory, 13(1), 21–27.	Tabachnick, B.G. & Fidell, L.S. (2013). Using Multivariate Statistics (6th ed.). Pearson. ISBN: 978-0205849574
Alias	EFA, CFA, latent variable modeling	KNN, K-En Yakın Komşu (KNN), nearest neighbor classifier, instance-based learning	Multivariate ANOVA, Çok Değişkenli ANOVA (MANOVA)
Närliggande	3	5	5
Sammanfattning	Factor analysis is a statistical technique for identifying latent (unobserved) dimensions underlying observed variables, developed by Louis Leon Thurstone in the 1930s and formalized by Jöreskog (1969). Exploratory factor analysis (EFA) discovers unknown factor structure from data; confirmatory factor analysis (CFA) tests hypothesized relationships between observed and latent variables. Essential in psychometrics (test development), organizational research (measuring constructs like leadership style), and biomedicine (identifying disease subtypes), factor analysis reduces dimensionality while revealing conceptual organization in multivariate data.	K-Nearest Neighbors (KNN), formalized by Cover and Hart in 1967, is a non-parametric, instance-based method that classifies or predicts a new observation by looking at the k closest examples in the training data. For classification it takes a majority vote among those neighbors; for regression it averages their values.	MANOVA is a parametric hypothesis test that simultaneously compares group means across multiple continuous dependent variables, controlling the inflation of Type I error that would result from running separate ANOVAs. Key multivariate test statistics — Wilks' Lambda, Pillai's Trace, Hotelling-Lawley Trace, and Roy's Greatest Root — were developed between the 1930s and 1950s, with Wilks' Lambda formalised by Samuel Stanley Wilks in 1932.