Concept

Quartile

Quartiles are three values that divide a data set into four equal parts. The quartiles are denoted as

Q_{1},

Q_{2},

and

Q_{3} .

The second quartile

Q_{2},

also known as the median, divides the ordered data set into two halves.

Q_{2} ↑ a b c Lower half d e f g Upper half

The median of the lower half is the first quartile

Q_{1},

and the median of the upper half is the third quartile

Q_{3} .

Q_{2} ↑ a b c Lower half d e f g Upper half ↓ ↓ Q_{1} Q_{3}

Moreover, the first quartile is also called lower quartile, and the third quartile is also called upper quartile. The difference between the upper and lower quartiles is the interquartile range. To find the quartiles, the corresponding data set must first be written in order.

{{ article.displayTitle }}

{{ 'ml-heading-abilities-covered' | message }}

{{ 'ml-heading-lesson-settings' | message }}

Concept

Quartile

	{{ 'ml-lesson-number-slides' \| message : article.intro.bblockCount}}
	{{ 'ml-lesson-number-exercises' \| message : article.intro.exerciseCount}}
	{{ 'ml-lesson-time-estimation' \| message }}