Interquartílico

Interquartílico is a term that appears sporadically in Spanish-language statistical writing to denote concepts related to the interquartile range. The word is formed from inter- (between) and cuartil (quartile) with the adjectival suffix -ico. It is not part of standardized statistical terminology and is generally considered a neologism or informal usage.

Meaning and scope: When used, interquartílico typically refers to elements that pertain to the interquartile range (IQR), the dispersion of the central 50% of a data set lying between the first quartile (Q1) and the third quartile (Q3). In this sense, it can describe intervals, measures, or methods that focus on the region between Q1 and Q3.

Calculation: The interquartílico interval is commonly understood as the interval [Q1, Q3], where Q1 is the 25th percentile and Q3 is the 75th percentile. The interquartile range is IQR = Q3 − Q1. This central measure emphasizes data stability by excluding extreme values outside the quartile bounds.

Applications: In descriptive statistics, the central region defined by the interquartílico concept is visualized in box plots, with the box spanning Q1 to Q3. For outlier detection, rules based on the IQR (for example, values below Q1 − 1.5·IQR or above Q3 + 1.5·IQR) rely on the same central data range.

See also: Interquartile range, Quartiles, Box plot, Robust statistics.

Notes: Because interquartílico is not a standard term, its precise meaning depends on context. In formal texts, writers typically use intercuartílico or interquartile range, avoiding the term unless its usage is explicitly defined.