Box cov phiaj xwm muaj txiaj ntsig zoo li lawv qhia tus qhab nia nruab nrab ntawm cov ntaub ntawv teev. Qhov nruab nrab yog qhov nruab nrab tus nqi los ntawm ib pawg ntawm cov ntaub ntawv thiab qhia los ntawm kab uas faib lub thawv rau hauv ob feem. Ib nrab cov qhab nia ntau dua lossis sib npaug ntawm tus nqi no thiab ib nrab yog tsawg dua.
Puas lub thawv ntawv qhia qhov txhais tau li cas?
Koj tsis tuaj yeem pom qhov txhais tauntawm lub thawv ntawv nws tus kheej. Cov ntaub ntawv uas koj tau txais los ntawm lub thawv ntawv yog tsib lub ntsiab lus, uas yog qhov tsawg kawg nkaus, thawj quartile, nruab nrab, thib peb quartile, thiab siab kawg.
Puas boxplot hauv R Qhia txhais los yog nruab nrab?
Ntxiv txhais taw tes rau lub boxplot hauv R
Rau lub neej ntawd, thaum koj tsim a boxplot qhov nruab nrab yog tso tawm. Txawm li cas los xij, tej zaum koj kuj yuav nyiam tso saib qhov txhais tau tias lossis lwm yam yam ntxwv ntawm cov ntaub ntawv.
Puas yog qhov nruab nrab thiab nruab nrab tib yam hauv lub thawv ntawv?
Lub ntsiab lus yuav zoo ib yam li qhov nruab nrab, thiab lub thawv ntawv yuav zoo sib xws. Yog tias qhov kev faib tawm yog skewed rau txoj cai feem ntau qhov tseem ceeb yog 'me', tab sis muaj ob peb qhov tshwj xeeb loj. Cov txiaj ntsig tshwj xeeb no yuav cuam tshuam qhov nruab nrab thiab rub nws mus rau sab xis, kom lub ntsiab lus yuav siab dua qhov nruab nrab.
Puas yog nruab nrab ntawm ib lub thawv phiaj lub ntsiab lus lossis nruab nrab?
Lub thawv nyob rau hauv ib lub thawv ntawv qhia koj lub interquartile ntau yam, lub ntsiab lus cov ntaub ntawv poob ntawm thawj thiab thib peb quartile. Yog hais tias cov ntaub ntawv yog skewed, lub median yuav tsis yog nyob rau hauv nruab nrab ntawm lubIQR. Cov neeg nruab nrab tuaj yeem pom thoob plaws hauv lub thawv vim tias cov ntaub ntawv faib tawm li cas.
