first quartile
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first quartile — Statistics. (in a frequency distribution) the smallest quartile; the twenty fifth percentile; the value of the variable below which one quarter of the elements are located. * * * … Universalium
first quartile — Statistics. (in a frequency distribution) the smallest quartile; the twenty fifth percentile; the value of the variable below which one quarter of the elements are located … Useful english dictionary
Quartile — In descriptive statistics, a quartile is any of the three values which divide the sorted data set into four equal parts, so that each part represents one fourth of the sampled population. Definitions * first quartile (designated Q1) = lower… … Wikipedia
quartile deviation — noun : one half of the difference obtained by subtracting the first quartile from the third quartile in a frequency distribution * * * quartile deviation noun (statistics) The distance between the values below which the lowest fourth and above… … Useful english dictionary
quartile — /kwawr tuyl, til/, n. 1. Statistics. (in a frequency distribution) one of the values of a variable that divides the distribution of the variable into four groups having equal frequencies. Cf. first quartile, median, third quartile. 2. Astrol. a… … Universalium
quartile — noun a) Any of the three points that divide an ordered distribution into four parts, each containing a quarter of the population. This school is ranked in the first quartile. b) Any one of the four groups so divided … Wiktionary
quartile — The argument of the cumulative distribution function corresponding to a probability of either 1/4 (first or lower quartile) or 3/4 (third or upper quartile); (of a sample) the value below which occurs a quarter (first or lower quartile) or three… … Dictionary of automotive terms
Quartile coefficient of dispersion — In statistics, the quartile coefficient of dispersion is a descriptive statistic used to make comparisons within and between data sets. The statistic is easily computed using the first ( Q 1) and third ( Q 3) quartiles for each data set. Consider … Wikipedia
lower quartile — noun The quartile (designated Q) having the lowest value; it cuts off the lowest 25% of data. Syn: first quartile … Wiktionary
Box plot — In descriptive statistics, a boxplot (also known as a box and whisker diagram or plot) is a convenient way of graphically depicting groups of numerical data through their five number summaries (the smallest observation, lower quartile (Q1),… … Wikipedia
Quantile — Quantiles are points taken at regular intervals from the cumulative distribution function of a random variable. Dividing ordered data into q essentially equal sized data subsets is the motivation for q quantiles; the quantiles are the data values … Wikipedia
