Vim li cas peb thiaj siv cov kev ntsuas ntawm kev tawg?
Vim li cas peb thiaj siv cov kev ntsuas ntawm kev tawg?

Video: Vim li cas peb thiaj siv cov kev ntsuas ntawm kev tawg?

Video: Vim li cas peb thiaj siv cov kev ntsuas ntawm kev tawg?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
Anonim

Kev ntsuas ntawm dispersion yog ib qho tseem ceeb heev vim lawv tuaj yeem qhia koj hauv ib qho qauv tshwj xeeb, lossis pab pawg neeg. Thaum nws los txog rau cov qauv, uas kev tawg Nws yog ib qho tseem ceeb vim hais tias nws txiav txim siab cov npoo ntawm qhov yuam kev koj yuav muaj thaum ua inferences txog ntsuas ntawm central tendency, zoo li nruab nrab.

Tib neeg kuj nug, lub ntsiab lus ntawm kev ntsuas kev sib cais yog dab tsi?

Hauv kev txheeb cais, kev tawg (tseem hu ua variability, scatter, or spread) yog qhov uas qhov kev faib tawm yog ncab los yog nyem. Cov piv txwv ntawm ntsuas ntawm kev txheeb cais kev tawg yog cov variance, tus qauv sib txawv, thiab interquartile ntau yam.

Ib yam li ntawd, kev ntsuas ntawm dispersion qhia li cas? Raws li lub npe qhia, lub ntsuas ntawm dispersion qhia kev tawg ntawm cov ntaub ntawv. Nws qhia qhov txawv ntawm cov ntaub ntawv los ntawm ib leeg thiab muab lub tswv yim meej txog kev faib cov ntaub ntawv. Cov ntsuas ntawm dispersion qhia homogeneity los yog heterogeneity ntawm kev faib cov kev soj ntsuam.

Ib yam li ntawd, cov kev ntsuas tseem ceeb ntawm kev tawg yog dab tsi?

Muaj peb loj ntsuas ntawm dispersion : range, interquartile range thiab standard deviation. Cov no sib txawv ntawm lub zog thiab qhov nyuaj, tab sis qhia ib yam hauv ib qho: qhov qhab nia qis dua, qhov muaj zog hauv nruab nrab thiab qis dua. kev tawg ntawm cov ntaub ntawv teev.

Ib qho piv txwv ntawm dispersion yog dab tsi?

Siv kev tawg hauv ib kab lus. npe. Dispersion txhais tau tias yog kev tawg lossis tawg ntawm ib yam dab tsi. Ib piv txwv ntawm dispersion yog pov cov ntawv me me thoob plaws hauv pem teb. Ib piv txwv ntawm dispersion yog cov xim rays ntawm lub teeb los ntawm ib lub prism uas tau dai rau hauv lub qhov rais tshav ntuj.

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