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A demerit is a point given to a student as a penalty for bad behavior. [1] Under this once common practice, a student is given a number of merits during the beginning of the school term and a certain number of merits are deducted for every infraction committed. [2] Schools use the demerit record within a point-based system to punish misbehavior.
In statistics, a central tendency (or measure of central tendency) is a central or typical value for a probability distribution. [1] Colloquially, measures of central tendency are often called averages. The term central tendency dates from the late 1920s. [2] The most common measures of central tendency are the arithmetic mean, the median, and ...
Statistics (from German: Statistik, orig. "description of a state, a country") [ 1][ 2] is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. [ 3][ 4][ 5] In applying statistics to a scientific, industrial, or social problem, it is conventional to begin with a statistical population or ...
One-factor-at-a-time method. The one-factor-at-a-time method, [1] also known as one-variable-at-a-time, OFAT, OF@T , OFaaT, OVAT, OV@T, OVaaT, or monothetic analysis is a method of designing experiments involving the testing of factors, or causes, one at a time instead of multiple factors simultaneously.
Principal component analysis (PCA) is a widely used method for factor extraction, which is the first phase of EFA. [ 4 ] Factor weights are computed to extract the maximum possible variance, with successive factoring continuing until there is no further meaningful variance left. [ 4 ] The factor model must then be rotated for analysis. [ 4 ]
Bootstrapping estimates the properties of an estimand (such as its variance) by measuring those properties when sampling from an approximating distribution. One standard choice for an approximating distribution is the empirical distribution function of the observed data.
A norm-referenced test ( NRT) is a type of test, assessment, or evaluation which yields an estimate of the position of the tested individual in a predefined population, with respect to the trait being measured. Assigning scores on such tests may be described as relative grading, marking on a curve ( BrE) or grading on a curve ( AmE, CanE) (also ...
Blocking (statistics) In the statistical theory of the design of experiments, blocking is the arranging of experimental units that are similar to one another in groups (blocks) based on one or more variables. These variables are chosen carefully to minimize the impact of their variability on the observed outcomes.