1,729 articles
Mutual exclusivity
Mutual exclusivity, also called disjointness, is a property of events in probability theory: mutually exclusive events cannot occur together, so their joint probability is 0 and their probabilities add.
Mutual information
Mutual information, also called transinformation, is an information theory quantity measuring how much knowing one random variable reduces uncertainty about another; it is zero exactly when the variables are independent.
NACE
NACE, from the French Nomenclature statistique des activités économiques dans la Communauté européenne, is the EU statistical classification of economic activities, in use since 1970.
National Bureau of Statistics of China
The National Bureau of Statistics of China (国家统计局, NBS) is the State Council agency in charge of statistics nationwide, conducting censuses and compiling and publishing China's GDP.
National Health and Nutrition Examination Survey
The National Health and Nutrition Examination Survey (NHANES) is a CDC program of nationally representative health surveys, combining interviews, physical exams, and laboratory tests for about 5,000 Americans each year.
National Health Interview Survey
The National Health Interview Survey (NHIS) is a CDC household interview survey, conducted since 1957, that monitors the health of the U.S. civilian noninstitutionalized population.
National Institute of Statistics and Censuses (Argentina)
The National Institute of Statistics and Censuses (INDEC) is Argentina's national statistical office, created by law in 1968 to run the national census and produce official indicators like the consumer price index.
National Sample Survey
The National Sample Survey is India's continuing household survey program, run since 1950 and serving as the principal source of official data on consumption, employment, and poverty.
National Statistical Commission
The National Statistical Commission (NSC) is the apex body for India's official statistics, created by a government resolution in 2005 under the Ministry of Statistics and Programme Implementation.
National statistical offices of Africa and the Middle East
A survey of the principal national statistical offices of Africa and the Middle East, including Statistics South Africa, Kenya's KNBS, Nigeria's NBS, and Egypt's CAPMAS.
National statistical system
A national statistical system is the set of institutions in a country that produce official statistics, centered on the national statistical office and bound by statistical law.
National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System
National Vital Statistics Reports (NVSR), ISSN 1551-8922, is NCHS/CDC's monthly serial since 1998 (replacing the Monthly Vital Statistics Report) publishing provisional and final U.S. birth, death, marriage, and divorce statistics from the National Vital Statistics System.
National Vital Statistics System
The National Vital Statistics System (NVSS) is the United States' official source of national birth, death, and fetal-death statistics, compiled by the National Center for Health Statistics.
Natural experiment
A natural experiment is a study in which an external event, not the researcher, assigns people to different levels of an intervention, permitting causal estimation from observational data.
Natural filtration
The natural filtration of a stochastic process is the filtration generated by the process itself, the smallest one to which it is adapted, recording only the process's own past behavior.
Necessary condition analysis
Necessary condition analysis (NCA) is a statistical method that identifies conditions that must be present for an outcome to occur and estimates how strongly each constrains it.
Negative binomial distribution
The negative binomial distribution, also called the Pascal distribution, is a discrete distribution counting failures before a fixed number of successes, widely used for overdispersed count data.
Negative binomial model
The negative binomial model is a statistical model that uses the negative binomial distribution for count data whose variance exceeds its mean, underlying count regression and RNA-seq differential expression tests.
Negative binomial regression
Negative binomial regression is a regression method for count outcomes whose variance exceeds their mean, derived as a Poisson–gamma mixture and widely used in econometrics and RNA-seq analysis.
Nested cross-validation
Nested cross-validation, also called double cross-validation, runs an inner tuning loop within each outer cross-validation fold, avoiding the optimistic bias of scoring a model on data used to tune it.
Nested logit model
The nested logit model is a discrete choice model grouping alternatives into nests so unobserved utilities may correlate within a group, relaxing the multinomial logit's IIA assumption.
Nested sampling
Nested sampling is a Monte Carlo algorithm in Bayesian statistics, introduced by John Skilling in 2006, that computes a model's evidence with posterior samples as a by-product.
Network data envelopment analysis
Network data envelopment analysis (NDEA) is a nonparametric linear-programming method in operations research that measures efficiency of units split into connected sub-processes, locating where inefficiency arises.
Network meta-analysis
Network meta-analysis, also called mixed treatment comparisons, is a statistical method comparing three or more treatments in one analysis, combining direct and indirect trial evidence.
Network meta-regression
Network meta-regression (NMR) is a statistical method in evidence synthesis that extends network meta-analysis by adding study-level covariates. It estimates interactions to see if effect modification explains heterogeneity.
Network sampling
Network sampling is a family of survey methods for drawing samples of hard-to-reach, hidden populations by following links of an underlying social network instead of a complete list.
Network tomography
Network tomography is a statistical method, introduced by Y. Vardi in 1996, that infers internal link delay, loss, or traffic from end-to-end measurements between edge nodes.
Neural posterior estimation
Neural posterior estimation (NPE) is a simulation-based Bayesian method that trains a neural density estimator on simulated parameter–data pairs to approximate posteriors without a likelihood function.
Newsvendor model
The newsvendor model, also called the newsboy problem, is a single-period inventory model that finds the profit-maximizing order quantity for a product with uncertain demand and no chance to reorder.
Neyman allocation
Neyman allocation is a stratified sampling rule that assigns each stratum a sample size proportional to its population size and standard deviation, minimizing variance at fixed total sample size.