Video: Vim li cas peb thiaj siv cov kev ntsuas ntawm kev tawg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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.
Pom zoo:
Vim li cas peb thiaj li hais txog kev txwv tsis pub muaj kev hais tawm thiab thaum twg peb yuav hais cov kev txwv?
Peb hais txog kev txwv vim nws yuav ua rau qhov sib npaug tsis tau txhais hauv qee qhov txiaj ntsig ntawm x. Qhov kev txwv ntau tshaj plaws rau cov lus qhia muaj nuj nqis yog N / 0. Qhov no txhais tau tias txhua tus lej muab faib los ntawm xoom tsis tau txhais. Piv txwv li, rau txoj haujlwm f(x) = 6/x², thaum koj hloov x = 0, nws yuav ua rau 6/0 uas tsis tau txhais
Vim li cas peb thiaj li kho cov coefficients thaum ntsuas cov tshuaj sib npaug thiab tsis yog cov ntawv sau npe?
Thaum koj hloov cov coefficients, koj tsuas yog hloov tus naj npawb ntawm cov molecules ntawm cov khoom tshwj xeeb. Txawm li cas los xij, thaum koj hloov cov ntawv sau npe, koj tab tom hloov cov tshuaj nws tus kheej, uas yuav ua rau koj qhov sib npaug tshuaj tsis raug
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Vim li cas kev ntsuas thiab ntsuas qhov tseem ceeb hauv kev tshawb fawb txog kev lag luam?
Cov nplai tau siv ntau zaus hauv kev tshawb fawb kev lag luam vim tias lawv pab hloov cov ntaub ntawv zoo (xav, kev xav, kev xav) rau hauv cov ntaub ntawv ntau, cov lej uas tuaj yeem txheeb xyuas tau. Koj tsim ib qho kev ntsuas los ntawm kev muab cov khoom (yuav ua tau piav qhia) rau tus lej
Vim li cas peb thiaj siv lub tshuab ntsuas qhov sib txawv ntawm theem?
Phase contrast yog nyob deb ntawm txoj kev siv ntau tshaj plaws hauv kev siv lub teeb pom kev zoo. Nws yog cov txheej txheem tsim microscopy hauv kab lis kev cai ntawm tes thiab nyob hauv cell imaging. Thaum siv cov txheej txheem pheej yig no, cov hlwb muaj sia tuaj yeem pom hauv lawv lub xeev ntuj yam tsis muaj kev txhim kho yav dhau los lossis cov ntawv sau