Mipango

Kikokotoo cha Robo (Quartile)

Tafuta muhtasari wa namba tano wa seti ya data — ndogo zaidi, Q1, wastani wa kati, Q3 na kubwa zaidi — pamoja na IQR na thamani zisizo za kawaida kwa mchoro wa sanduku.

Angalau thamani 4, zikitenganishwa kwa koma au nafasi

Tokeo

Weka thamani kisha bonyeza Kokotoa ili kuona tokeo.

Fomula

IQR=Q3−Q1\text{IQR} = Q_3 - Q_1

The spread of the middle half of the data.

x<Q1−1.5 IQR  or  x>Q3+1.5 IQRx < Q_1 - 1.5\,\text{IQR} \ \text{ or } \ x > Q_3 + 1.5\,\text{IQR}

A value outside these fences is an outlier.

Jinsi ya kutumia kikokotoo hiki

  1. Enter at least 4 numbers separated by commas, spaces or new lines.
  2. Press Calculate to get the five-number summary, the IQR and any outliers.

Mfano uliotatuliwa

Eight test scores

Sorted: 2, 4, 4, 5, 6, 7, 8, 30. The median is (5 + 6) ÷ 2 = 5.5.

Lower half 2, 4, 4, 5 gives Q1 = 4; upper half 6, 7, 8, 30 gives Q3 = 7.5.

IQR = 7.5 − 4 = 3.5. The fences are −1.25 and 12.75, so 30 is an outlier.

Maswali yanayoulizwa mara kwa mara

Why does my spreadsheet give different quartiles?

There are several quartile methods. Sumzo uses the median-of-halves method taught in most schools; spreadsheet functions such as QUARTILE often interpolate instead.

Is the median included in the halves?

No. With an odd number of values the middle one is left out of both halves.

Jifunze zaidi