Kuartil itu apa sih? Jelaskan dalam bahasa sunda ya

Dina statistik déskriptif, kuartil nyaéta hiji tina tilu nilai nu ngabagi susunan data kana opat bagéan.

kuartil kahiji = kuartil handap = motong data sahandapeun 25% = 25th persentil

kuartil kadua = median = motong satengahna data = 50th persentil

kuartil katilu = upper quartile = motong data 25% ka luhur, atawa handapeun 75% = 75th percentile

béda antara kuartil luhur jeung handap disebut interquartile range.

Ilaharna penting keur interpolasi antara nilai keur ngalengkepan ieu, siga conto di handap ieu.

------------- kuartil kahiji, Q1 = (105+106)/2 = 105.5

------------- kuartil kadua, Q2 = (109+110)/2 = 109.5

------------- kuartil katilu, Q3 = (112+115)/2 = 113.5

Nyokot nilai méan sisi séjén tina kuartil mangrupa kaputusan teu pasti: dina conto di luhur, nilai kuartil kudu aya dina rentang [105,106], [109,110] and [112, 115].

If the sample size is not a multiple of four, some of the quartiles may be numbers in the original data set, as in this example: