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Null distribution is a tool scientists often use when conducting experiments. The null distribution is the distribution of two sets of data under a null hypothesis. If the results of the two sets of data are not outside the parameters of the expected results, then the null hypothesis is said to be true. Null and alternative distribution.
Expectation–maximization algorithm. In statistics, an expectation–maximization ( EM) algorithm is an iterative method to find (local) maximum likelihood or maximum a posteriori (MAP) estimates of parameters in statistical models, where the model depends on unobserved latent variables. [1] The EM iteration alternates between performing an ...
Physical layer. The Open Systems Interconnection ( OSI) model is a reference model from the International Organization for Standardization (ISO) that "provides a common basis for the coordination of standards development for the purpose of systems interconnection." [2] In the OSI reference model, the communications between systems are split ...
Transport in Berlin. Berlin has developed a highly complex transportation infrastructure providing very diverse modes of urban mobility. [1] 979 bridges cross 197 kilometers of innercity waterways, 5,334 kilometres (3,314 mi) of roads run through Berlin, of which 73 kilometres (45 mi) are motorways. [2] Long-distance rail lines connect Berlin ...
Linear model. In statistics, the term linear model refers to any model which assumes linearity in the system. The most common occurrence is in connection with regression models and the term is often taken as synonymous with linear regression model. However, the term is also used in time series analysis with a different meaning.
A "save as" file dialog from GTK.The file browser is hidden inside a disclosure widget. An "open" file dialog opened from a web browser on Windows 10.. In computing, a file dialog (also called file selector/chooser, file requester, or open and save dialog) is a dialog box-type graphical control element that allows users to choose a file from the file system.
The general linear model is a generalization of multiple linear regression to the case of more than one dependent variable. If Y, B, and U were column vectors, the matrix equation above would represent multiple linear regression. Hypothesis tests with the general linear model can be made in two ways: multivariate or as several independent ...
Capital Group Companies, Inc. Capital Group is an American financial services company. It ranks among the world's oldest and largest investment management organizations, with over $2.6 trillion in assets under management. Founded in Los Angeles, California in 1931, it is privately held and has offices around the globe in the Americas, Asia ...