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The arithmetic mean (or simply mean or average) of a list of numbers, is the sum of all of the numbers divided by the number of numbers. Similarly, the mean of a sample , usually denoted by , is the sum of the sampled values divided by the number of items in the sample. For example, the arithmetic mean of five values: 4, 36, 45, 50, 75 is:
Login. In computer security, logging in (or logging on, signing in, or signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. The user credentials are typically some form of a username and a password, [1] and these credentials themselves are sometimes referred ...
Bootstrapping (linguistics), a term used in language acquisition. Bootstrapping (statistics), a method for assigning measures of accuracy to sample estimates. Bootstrap aggregating, a method used to improve the stability and accuracy of machine learning algorithms. Bootstraps, the stage name of American singer and songwriter Jordan Beckett.
Plus–minus sign. The plus–minus sign, ±, is a symbol with multiple meanings: In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction. In statistics and experimental sciences, the sign commonly indicates the confidence interval or uncertainty ...
In children or toddlers with ADHD, this can lead to symptoms at home, in day care, or at school, such as: trouble focusing on activities and becoming easily distracted. low attention span while ...
In mathematics, a matrix ( pl.: matrices) is a rectangular array or table of numbers, symbols, or expressions, arranged in rows and columns, which is used to represent a mathematical object or property of such an object. For example, is a matrix with two rows and three columns. This is often referred to as a "two by three matrix", a " matrix ...
In sign languages, the term classifier construction (also known as classifier predicates) refers to a morphological system that can express events and states. [1] They use handshape classifiers to represent movement, location, and shape. Classifiers differ from signs in their morphology, namely that signs consist of a single morpheme.
Here are 9 of the world’s most popular herbal medicines, including their main benefits, uses, and relevant safety information. 1. Echinacea. Echinacea, or coneflower, is a flowering plant and ...