Pelan

Kalkulator Kuartil

Cari ringkasan lima nombor bagi set data — minimum, Q1, median, Q3 dan maksimum — serta julat antara kuartil dan nilai luar untuk plot kotak.

Sekurang-kurangnya 4 nilai, dipisahkan dengan koma atau ruang

Keputusan

Masukkan nilai dan tekan Kira untuk melihat keputusan.

Formula

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.

Cara menggunakan kalkulator ini

  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.

Contoh berserta jalan kerja

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.

Soalan lazim

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.

Ketahui lebih lanjut