Video: Koj puas tuaj yeem sib cuam tshuam dichotomous variables?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Raws li nrog lub point-biserial, xam lub Pearson kev sib raug zoo rau ob dichotomous variables yog tib yam li phi. Zoo ib yam li t-test/ kev sib raug zoo sib npaug, kev sib raug zoo ntawm ob dichotomous variables yog tib yam li qhov sib txawv ntawm ob pab pawg thaum lub dependent sib txawv yog dihotmous.
Ua raws li qhov no hauv kev txiav txim siab, koj puas tuaj yeem ua kev sib raug zoo nrog categorical variables?
Rau ib tug dichotomous categorical variable thiab tsis tu ncua variable koj ua tau xam ib Pearson kev sib raug zoo yog tias categorical variable muaj 0/1-coding rau pawg. Tab sis thaum twg koj muaj ntau tshaj ob pawg rau cov categorical variable lub Pearson kev sib raug zoo tsis tsim nyog lawm.
Tsis tas li ntawd, koj puas tuaj yeem siv cov ntaub ntawv nominal rau kev sib raug zoo? Cov ntaub ntawv nominal tam sim no tsis muaj ib kev sib raug zoo coefficient, xws li twb tau txhais rau tiag cov ntaub ntawv . Kev ntsuas yog ua tau siv tus determinant, nrog rau kev txhais lus tseem ceeb uas tus txiav txim muab qhov piv ntawm cov ntim.
Cov lus nug tseem yog, dab tsi yog qhov sib txawv dichotomous?
A dichotomous sib txawv yog ib qho uas siv ib qho ntawm ob qhov txiaj ntsig tau thaum pom lossis ntsuas. Tus nqi feem ntau yog qhov sawv cev rau qhov ntsuas sib txawv (piv txwv li, hnub nyoog: qis dua 65/65 thiab tshaj) lossis tus cwj pwm (xws li poj niam txiv neej: txiv neej / poj niam).
Puas yog hnub nyoog yog qhov hloov pauv tsis tu ncua?
Hnub nyoog yog, technically, tsis tu ncua thiab piv. Ib tus neeg hnub nyoog puas, tom qab tag nrho, muaj lub ntsiab lus zero point (yug) thiab yog tsis tu ncua yog koj ntsuas nws precisely txaus. Nws yog lub ntsiab lus hais tias ib tug neeg (los yog ib yam dab tsi) yog 7.28 xyoo.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm cov rog yuav cuam tshuam rau kev sib cuam tshuam ntawm cov dej molecules?
1 Teb. Qhov tseeb, dej muaj tag nrho peb hom kev sib xyaw ua ke, nrog qhov muaj zog tshaj plaws yog hydrogen bonding. Txhua yam muaj London dispersion yuam cov kev sib cuam tshuam tsis muaj zog yog ib ntus dipoles uas tsim los ntawm kev hloov ntawm electrons nyob rau hauv ib lub molecule
Dab tsi yog plaub yam sib txawv uas tuaj yeem cuam tshuam tus nqi ntawm cov tshuaj tiv thaiv?
Reactant concentration, lub cev lub cev ntawm cov reactants, thiab cheeb tsam saum npoo, qhov kub thiab txias, thiab muaj cov catalyst yog plaub yam tseem ceeb uas cuam tshuam rau cov tshuaj tiv thaiv
Dab tsi yog qhov txawv ntawm kev cuam tshuam kev cuam tshuam thiab kev cuam tshuam cuam tshuam?
Paub qhov txawv ntawm kev cuam tshuam kev tsim kho thiab kev cuam tshuam puas tsuaj. Kev tsim kev cuam tshuam tshwm sim thaum lub crests ntawm ob nthwv dej ntxiv ua ke. Kev cuam tshuam kev puas tsuaj tshwm sim thaum lub crest ntawm ib yoj raug txo los ntawm lub trough ntawm lwm tus
Puas yog cov kev cuam tshuam cuam tshuam ib txwm endothermic?
Cov txheej txheem ntawm dissolving yog endothermic thaum tsawg zog tawm thaum dej molecules "daim ntawv cog lus" rau cov kuab tshuaj dua yog siv los rub cov kua sib nrug. Vim tias lub zog tsawg dua yog tso tawm ntau dua li siv, cov molecules ntawm cov tshuaj txav qeeb dua, ua rau qhov kub thiab txias
Lub zog cua sov cuam tshuam li cas rau kev sib cuam tshuam tshuaj?
Cov tshuaj tiv thaiv tshuaj feem ntau cuam tshuam nrog kev hloov pauv ntawm lub zog vim kev tawg thiab tsim cov ntawv cog lus. Cov tshuaj tiv thaiv uas lub zog raug tso tawm yog cov tshuaj tiv thaiv exothermic, thaum cov uas siv lub zog cua sov yog endothermic