It is probably a box and whiskers plot.
A quartile refers to one of four groups comprising 25% of the sample, each.
quartile- one of the values of a variable that divides the distribution of the variable into four groups having equal frequencies.
Because the word groups indicate an additional meaning beyond the words themselves, the two noun groups should be hyphenated (with a comma, also) as "hands-on, results-oriented quartile".
A quartile divides a distribution into four equal parts, each containing 25% of the data. The first quartile (Q1) represents the value below which 25% of the data fall, the second quartile (Q2) is the median, and the third quartile (Q3) is the value below which 75% of the data fall.
The interquartile range is the difference between the Lower quartile and the upper quartile. Obviously you need to be able to find these values. Haylock (2006) explains how to do this for difficult size groups in mathematics explained for primary teachers. He explains the position of the lower quartile is a quarter of (n+1) and that of the upper quartile is three-quarters of (n+1). So for a group of 7 numbers, you find a quarter of 8, which is 2. Therefore the number in second place is the lower quartile. Three quarters of 8 is 6 and so the number in 6th position is the upper quartile. Now take the lower quartile from the upper quartile.
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Economics interest groups are organized to represent small and large businesses. phagit
In statistics, a quartile is each of four equal groups into which a population can be divided according to the distribution of values of a particular variable.
They are organized in Areas
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