#statistics

• Deviation — The act of deviating; a departure from a norm, rule, protocol, or an established mean value. In medical biostatistics, the term is fundamental (standard deviation) to measure the dispersion of clinical data, while in occupational medicine, it indicates a breach of protective or hygiene regulations.
• Abscissa / Horizontal axis — The first coordinate of a point in a two-dimensional Cartesian coordinate system (the Ox axis), frequently used in medical graphs, epidemiological studies, and statistical charts to plot the independent variable (e.g., time, drug dosage, or age).
• Actuarial science — The science, profession, or institutional department dealing with the application of mathematical and statistical methods to assess risks in the insurance, pension, and finance industries. This structural field analyzes complex demographic and economic models to ensure long-term solvency of companies against uncertain future events.
• To aggregate — To collect, gather, unite, or assemble separate elements, individuals, statistical data, or material particles into a single whole, a compact mass, or a global structure. In macroeconomics, it describes the operation of centralizing individual or microeconomic indicators to obtain global aggregates, while in sociology it refers to the clustering of scattered groups around a common doctrine.
• Aggregation — The act of aggregating and its result; the process through which independent elements, numerical data, biological cells, or mineral fragments are reunited into a coherent whole or a single mass. In databases and programming, aggregation represents a technique whereby data is grouped to perform global statistical operations (such as sums or averages), reducing processed volume.
• Adjustment — The act of adjusting and its result; a complex and methodical process of correcting, calibrating, fitting, or aligning the physical, financial, structural, or statistical parameters of an element to match an optimal state, a predefined standard, or a newly emerged reality in the environment. In economics, it represents the rectification of prices or budgets under inflationary pressure; in tailoring, the geometric adaptation of garments to the body; in statistics, the removal of parasitic errors from data sets to obtain a faithful representation of real trends.
• Abnormal — Deviating from the norm, from the rule, or from the operating state considered usual, natural, or healthy; presenting a structural, physiological, or behavioral anomaly. In a statistical context, the term defines a value or manifestation situated outside the accepted limits of standard variation within an analyzed population, often indicating an underlying pathology or dysfunction.
• Abnormality — The state, quality, or structural property of being abnormal; a clear deviation from the norm, from established rules, or from a physiological, anatomical, or psychological state considered healthy and typical. In a clinical context, the term designates the presence of a genetic anomaly, congenital malformation, or behavioral disorder that requires further investigation or treatment.
• Approximate — An etymological or bookish spelling variant for the verb 'a aproxima'; the act of determining a value, quantity, or result that is close to the real, exact, or rigorous one, without being perfectly identical. In numerical and structural computation, approximation is used to simplify complex equations and obtain quick practical solutions.
• Approximation — An etymological or bookish spelling variant for the noun 'aproximare'; the act of determining or expressing an estimated value, quantity, or result situated very close to mathematical truth or physical reality, without ensuring absolute exactness. It represents a fundamental structural methodological procedure in numerical analysis, used to bring complex equations into accessible computational forms by controlled management of a margin of error or a preset tolerance.
• ARIMA model — An autoregressive integrated moving average statistical model widely used in the analysis and forecasting of complex time series. This mathematical tool structurally combines autoregressive processes and moving average components, applying a differencing step to transform non-stationary data into stationary data, facilitating the prediction of economic, meteorological, or financial trends.
• Female ancestors — The plural form of the term 'ascendentă'; it refers to multiple lines, slopes, or growing trends. In a legal and genealogical context, the noun designates all direct relatives from a previous generation (mothers, grandmothers, great-grandmothers), legally recognized in inheritance rights or determining kinship degrees.
• Assist — A decisive pass or delivery of the ball to a teammate, performed in an optimal structural manner that allows them to immediately score a point, goal, or basket; goal assist. The term is a neologism borrowed from international sports terminology and is heavily used in statistics to evaluate a player's teamwork and tactical vision.
• Attributable — Capable of being attributed, imputed, or assigned to a specific cause, person, or entity; a determining factor whose direct effects can be logically or scientifically identified and demonstrated. In specialized terminology, it describes a direct causal link between an initial event and an observed secondary result.
• Self-fitted curve — An adapted form or rare technical neologism used to describe a self-adjusted mathematical function, curve, or regression line over a set of experimental data. In advanced statistical analysis, it represents the property of an algorithm to automatically optimize equation parameters to minimize approximation errors.
• Average — A term borrowed from English, used as a neologism in Romanian statistics, economics, computing, and business jargon to denote the mean value, arithmetic average, or the midpoint of a data set; as an adjective, it describes an element that falls within normal, ordinary, or mediocre limits, lacking exceptional or extreme features. In corporate environments, it is frequently used to evaluate performance or standardized metrics.