Pertanyaan yang diberi tag multiple-regression

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Temukan distribusi dan ubah ke distribusi normal

Saya memiliki data yang menggambarkan seberapa sering suatu peristiwa berlangsung selama satu jam ("angka per jam", nph) dan berapa lama acara berlangsung ("durasi dalam detik per jam", dph). Ini adalah data asli: nph <- c(2.50000000003638, 3.78947368414551, 1.51456310682008, 5.84686774940732,...

normal-distribution data-transformation logistic generalized-linear-model ridge-regression t-test wilcoxon-signed-rank paired-data naive-bayes distributions logistic goodness-of-fit time-series eviews ecm panel-data reliability psychometrics validity cronbachs-alpha self-study random-variable expected-value median regression self-study multiple-regression linear-model forecasting prediction-interval normal-distribution excel bayesian multivariate-analysis modeling predictive-models canonical-correlation rbm time-series machine-learning neural-networks fishers-exact factorisation-theorem svm prediction linear reinforcement-learning cdf probability-inequalities ecdf time-series kalman-filter state-space-models dynamic-regression index-decomposition sampling stratification cluster-sample survey-sampling distributions maximum-likelihood gamma-distribution
8
Bagaimana melakukan SVD untuk memasukkan nilai yang hilang, contoh konkret

Saya telah membaca komentar yang bagus mengenai bagaimana menangani nilai yang hilang sebelum menerapkan SVD, tetapi saya ingin tahu cara kerjanya dengan contoh sederhana: Movie1 Movie2 Movie3 User1 5 4 User2 2 5 5 User3 3 4 User4 1 5 User5 5 1 5 Mengingat matriks di atas, jika saya menghapus...

r missing-data data-imputation svd sampling matlab mcmc importance-sampling predictive-models prediction algorithms graphical-model graph-theory r regression regression-coefficients r-squared r regression modeling confounding residuals fitting glmm zero-inflation overdispersion optimization curve-fitting regression time-series order-statistics bayesian prior uninformative-prior probability discrete-data kolmogorov-smirnov r data-visualization histogram dimensionality-reduction classification clustering accuracy semi-supervised labeling state-space-models t-test biostatistics paired-comparisons paired-data bioinformatics regression logistic multiple-regression mixed-model random-effects-model neural-networks error-propagation numerical-integration time-series missing-data data-imputation probability self-study combinatorics survival cox-model statistical-significance wilcoxon-mann-whitney hypothesis-testing distributions normal-distribution variance t-distribution probability simulation random-walk diffusion hypothesis-testing z-test hypothesis-testing data-transformation lognormal r regression agreement-statistics classification svm mixed-model non-independent observational-study goodness-of-fit residuals confirmatory-factor neural-networks deep-learning
8
Persamaan untuk varians faktor inflasi

Mengikuti pertanyaan yang diajukan sebelumnya, varians inflation factor (VIFs) dapat dinyatakan sebagai adalah versi skala satuan panjang dariVIFj=Var(b^j)σ2=[w′jwj−w′jW−j(W′−jW−j)−1W′−jwj]−1VIFj=Var(b^j)σ2=[wj′wj−wj′W−j(W−j′W−j)−1W−j′wj]−1 \textrm{VIF}_j = \frac{\textrm{Var}(\hat{b}_j)}{\sigma^2}...

multiple-regression vif