Video: Lub thawv ntawv siv rau dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A lub thawv thiab whisker zaj yog ib txoj hauv kev los xaus ib pawg ntawm cov ntaub ntawv ntsuas ntawm lub sijhawm ntsuas. Nws yog feem ntau siv hauv kev piav qhia cov ntaub ntawv tsom xam. Hom duab no yog siv los qhia cov duab ntawm kev faib khoom, nws cov nqi nruab nrab, thiab nws qhov sib txawv.
Tom qab ntawd, lub thawv ntawv qhia li cas rau peb?
A boxplot yog ib txoj hauv kev los qhia txog kev faib cov ntaub ntawv raws li tsib lub ntsiab lus ("yam tsawg", thawj quartile (Q1), nruab nrab, thib peb quartile (Q3), thiab "siab tshaj"). Nws ua tau qhia koj txog koj qhov outliers thiab lawv cov nqi yog dab tsi.
Tsis tas li ntawd, yuav ua li cas koj thiaj nrhiav tau qhov ntau ntawm lub thawv ntawv? Thawj kauj ruam hauv kev tsim kho a lub thawv -thiab-xws li zaj yog ua ntej nrhiav qhov nruab nrab (Q2), qis quartile (Q1) thiab sab sauv quartile (Q3) ntawm cov ntaub ntawv muab. Tam sim no koj npaj txhij mus nrhiav lub interquartile ntau (IQR). Lub interquartile ntau yog qhov sib txawv ntawm lub quartile qaum thiab qis qis.
Tsis tas li ntawd paub, koj nyeem ib lub thawv thiab cov dab ntxwg nyoog li cas?
- Yam tsawg kawg nkaus (tus lej tsawg tshaj plaws hauv cov ntaub ntawv teev).
- First quartile, Q1, yog sab laug ntawm lub thawv (los yog sab xis ntawm sab laug whisker).
- Qhov nruab nrab yog qhia raws li ib txoj kab hauv nruab nrab ntawm lub thawv.
- Thib peb, Q3, qhia nyob rau sab xis ntawm lub thawv (ntawm sab laug ntawm txoj cai whisker).
Puas Boxplots qhia variance?
1 Teb. A boxplot qhia txog qhov ntau thiab qhov sib txawv ntawm qhov sib txawv (IQR), ob qho tib si yog kev ntsuas ntawm qhov sib txawv hauv cov ntaub ntawv teev. Feem ntau qhov ntau yog suav tias yog yooj yim heev cuam tshuam los ntawm qhov tseem ceeb, yog li IQR nyiam dua. Txawm li cas los xij, koj tuaj yeem kwv yees qhov sib txawv los ntawm a boxplot.
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