Flashcard 27 - Math Flashcard Set for the SAT Exam

first quartile: the median of the lower half of a data set
second quartile: the median of the entire data set
third quartile: the median of the upper half of a data set
interquartile range: the range of the middle \(50\%\) of a data set
range: the difference between the highest and lowest values of a data set

The first quartile divides the data set into two parts, with \(25\%\) of the values below it.

The second quartile represents the middle value and divides the data set into two equal halves.

The third quartile is the median of the upper half of the data set, with \(75\%\) of the values below it.

The interquartile range is the range of the middle \(50\%\) of the data set and provides a measure of spread.

The range, on the other hand, is the difference between the highest and lowest values in the data set, representing the total spread.