Pertanyaan yang diberi tag statistical-significance

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Interval kepercayaan saat menggunakan teorema Bayes

Saya menghitung beberapa probabilitas bersyarat, dan interval kepercayaan 95% yang terkait. Untuk banyak kasus saya, saya memiliki jumlah xkeberhasilan langsung dari npercobaan (dari tabel kontingensi), sehingga saya dapat menggunakan interval kepercayaan Binomial, seperti yang disediakan oleh...

r bayesian confidence-interval conditional-probability hidden-markov-model segmentation hypothesis-testing statistical-significance multiple-comparisons multiple-regression r regression survey sample finite-population pca model-selection dataset partitioning clustering time-series least-squares regression standard-error causality r time-series outliers missing-data machine-learning svm hypothesis-testing discrete-data r data-visualization survey likert finance regression pca feature-selection stepwise-regression underdetermined svm natural-language
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Post hoc test dalam ANOVA desain campuran 2x3 menggunakan SPSS?

Saya memiliki dua kelompok yang terdiri dari 10 peserta yang dinilai tiga kali selama percobaan. Untuk menguji perbedaan antara kelompok dan di tiga penilaian, saya menjalankan ANOVA desain campuran 2x3 dengan group(kontrol, eksperimental), time(pertama, kedua, tiga), dan group x time. Keduanya...

anova mixed-model spss post-hoc bonferroni time-series unevenly-spaced-time-series classification normal-distribution discriminant-analysis probability normal-distribution estimation sampling classification svm terminology pivot-table random-generation self-study estimation sampling estimation categorical-data maximum-likelihood excel least-squares instrumental-variables 2sls total-least-squares correlation self-study variance unbiased-estimator bayesian mixed-model ancova statistical-significance references p-value fishers-exact probability monte-carlo particle-filter logistic predictive-models modeling interaction survey hypothesis-testing multiple-regression regression variance data-transformation residuals minitab r time-series forecasting arima garch correlation estimation least-squares bias pca predictive-models genetics sem partial-least-squares nonparametric ordinal-data wilcoxon-mann-whitney bonferroni wilcoxon-signed-rank traminer regression econometrics standard-error robust misspecification r probability logistic generalized-linear-model r-squared effect-size gee ordered-logit bayesian classification svm kernel-trick nonlinear bayesian pca dimensionality-reduction eigenvalues probability distributions mathematical-statistics estimation nonparametric kernel-smoothing expected-value filter mse time-series correlation data-visualization clustering estimation predictive-models recommender-system sparse hypothesis-testing data-transformation parametric probability summations correlation pearson-r spearman-rho bayesian replicability dimensionality-reduction discriminant-analysis outliers weka
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Bagaimana cara membandingkan dua algoritma secara statistik pada tiga dataset dalam pemilihan dan klasifikasi fitur?

Latar belakang masalah: Sebagai bagian dari penelitian saya, saya telah menulis dua algoritma yang dapat memilih satu set fitur dari set data (data ekspresi gen dari pasien kanker). Fitur-fitur ini kemudian diuji untuk melihat seberapa baik mereka dapat mengklasifikasikan sampel yang tidak terlihat...

machine-learning statistical-significance computational-statistics standardization genetic-algorithms
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Mengapa model statistik cocok jika diberi set data yang sangat besar?

Proyek saya saat ini mungkin mengharuskan saya untuk membuat model untuk memprediksi perilaku sekelompok orang tertentu. set data pelatihan hanya berisi 6 variabel (id hanya untuk tujuan identifikasi): id, age, income, gender, job category, monthly spend di mana monthly spendadalah variabel...

modeling large-data overfitting clustering algorithms error spatial r regression predictive-models linear-model average measurement-error weighted-mean error-propagation python standard-error weighted-regression hypothesis-testing time-series machine-learning self-study arima regression correlation anova statistical-significance excel r regression distributions statistical-significance contingency-tables regression optimization measurement-error loss-functions image-processing java panel-data probability conditional-probability r lme4-nlme model-comparison time-series probability probability conditional-probability logistic multiple-regression model-selection r regression model-based-clustering svm feature-selection feature-construction time-series forecasting stationarity r distributions bootstrap r distributions estimation maximum-likelihood garch references probability conditional-probability regression logistic regression-coefficients model-comparison confidence-interval r regression r generalized-linear-model outliers robust regression classification categorical-data r association-rules machine-learning distributions posterior likelihood r hypothesis-testing normality-assumption missing-data convergence expectation-maximization regression self-study categorical-data regression simulation regression self-study self-study gamma-distribution modeling microarray synthetic-data
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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