小弟刚接触stata不久,老师在课堂上讲了一个案例,其中涉及到因子分析,没有基础表示对结果无法解读,就大神帮忙解读,万分感谢。老师用的是CGSS2006的城市数据,对生活满意度的指标进行因子分析以降维,输入的命令如下:1.factortest qe48* //factortest 这个命令有什么用?目的是什么呢?
结果://输出的结果表示看不懂
Determinant of the correlation matrix
Det = 0.116
Bartlett test of sphericity
Chi-square = 18043.782
Degrees of freedom = 28
p-value = 0.000
H0: variables are not intercorrelated
Kaiser-Meyer-Olkin Measure of Sampling Adequacy
KMO = 0.821
2.factor qe48*, mineigen(1)//其中显示的方法是:principal factors ,那pf主因子法和pcf主成分因子法有什么区别呢?
Factor analysis/correlation Number of obs = 8370
Method: principal factors Retained factors = 1
Rotation: (unrotated) Number of params = 8
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Factor | Eigenvalue Difference Proportion Cumulative
-------------+------------------------------------------------------------
Factor1 | 2.69462 2.13004 0.9863 0.9863
Factor2 | 0.56459 0.41581 0.2066 1.1929
Factor3 | 0.14878 0.18682 0.0545 1.2474
Factor4 | -0.03804 0.03196 -0.0139 1.2335
Factor5 | -0.07000 0.07328 -0.0256 1.2078
Factor6 | -0.14327 0.05843 -0.0524 1.1554
Factor7 | -0.20170 0.02115 -0.0738 1.0816
Factor8 | -0.22285 . -0.0816 1.0000
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LR test: independent vs. saturated: chi2(28) = 1.8e+04 Prob>chi2 = 0.0000
求大神解答,查了好久都查不出结果,万分感谢