lower quartile

The quartile (designated Q) having the lowest value; it cuts off the lowest 25% of data.
Syn: first quartile

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  • lower quartile — The value below which 25% of the data points in an ordered sample fall. Related links upper quartile Practical Law Dictionary. Glossary of UK, US and international legal terms. www.practicallaw.com. 2010 …   Law 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 — 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

  • upper quartile — The value below which 75% of the data points in an ordered sample fall. Related links lower quartile Practical Law Dictionary. Glossary of UK, US and international legal terms. www.practicallaw.com. 2010 …   Law dictionary

  • 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

  • Seven-number summary — In descriptive statistics, the seven number summary is a collection of seven summary statistics, and is a modification or extension of the five number summary. There are two common forms.(Parametric) Seven number summaryThe following numbers are… …   Wikipedia

  • Interquartile range — In descriptive statistics, the interquartile range (IQR), also called the midspread, middle fifty and middle of the #s, is a measure of statistical dispersion, being equal to the difference between the third and first quartiles.Unlike the (total) …   Wikipedia

  • Five-number summary — In descriptive statistics, the five number summary of a data set consists of:# the minimum (smallest observation) # the lower quartile or first quartile (which cuts off the lowest 25% of the data) # the median (middle value) # the upper quartile… …   Wikipedia

  • box and whiskers plot — noun A graphical summary of a numerical data sample through five statistics median, upper quartile, lower quartile and upper extreme and lower extreme values by depiction as a box wit …   Wiktionary

  • box plot — noun A graphical summary of a numerical data sample through five statistics: median, lower quartile, upper quartile, and some indication of more extreme upper and lower values. Syn: box and whisker diagram …   Wiktionary

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