Xa abaphandi befuna ukukhetha isampula esimeleyo kubemi abaninzi, bahlala basebenzisa indlela eyaziwayo njengekhethiweyo. Kule nkqubo yokukhetha, ilungu ngalinye leqela limelela ithuba elilinganayo lokunyulwa njengothathi-nxaxheba kwisifundo.
Ukukhethwa kweRandom ngeSabelo esiNgeniso
Ukhetho olukhethiweyo luhluke njani kwisabelo esingahleliyo ?
Ukukhethwa kwe-Random kubhekisela kwindlela isampuli efunyenwe ngayo kubemi lonke, ngelixa isabelo esingenako sichaza indlela abathathi-nxaxheba abelwe ngayo kuwo amaqela okulinga okanye okulawulayo.
Kunokwenzeka ukuba ukhetho olukhethiweyo kunye nesabelo esingenangqungquthela kwi-test. Cinga ukuba usebenzisa ukukhethwa okungahleliwe ukudweba abantu abangama-500 ukusuka kubemi ukuba bathathe inxaxheba kwisifundo sakho. Usebenzisa isabelo esingenakunikwa ukwabela iqela elingu- 250 labathathi-nxaxheba kwiqela elilawulayo (iqela elingafumani unyango okanye iinguqu ezizimeleyo) kwaye wabela ama-250 abathathi-nxaxheba kwiqela lokulinga (iqela elifumana unyango okanye iinguqu ezizimeleyo) .
Kutheni abaphandi basebenzisa ukukhetha okungahleliwe? Injongo kukunyusa ukuzaliswa kweziphumo. Ngokudweba isampula esingahleliyo kubemi abaninzi, injongo kukuba isampuli iya kubelwa iqela elikhulu kwaye kunokwenzeka ukuba lingaphantsi koxanduva.
Oko Kumelwe Ukwazi NgoKhetho oluHlawulekileyo kuPhando
Cinga ukuba umphandi ukhetha abantu ukuba bathathe inxaxheba kwisifundo. Ukuze bakhethe abathathi-nxaxheba, banokukhetha abantu basebenzisa ubuchule obulinganayo noluhlu oluthile lwemali. Basenokuqala ngokusebenzisa ukukhethwa okungahleliweyo ukukhetha iindawo zokuhlala kuzo ukuba bathathe inxaxheba.
Basenokusebenzisa inkqubo efanayo yokukhetha iidolophu, iindawo zokuhlala, imizi, iminyaka yobudala kunye nabachaphazelekayo ngabanye.
Enye into ebalulekileyo yokukhumbula kukuba iisampuli ezininzi zivame ukuba zimele, kuba ukhetho olukhethiweyo lungakhokelela kwisampula ekhethiweyo okanye engancinci ukuba ubuncinane besampula. Xa ubungakanani besampula buncinci, inxaxheba engavumelekanga inokuba nefuthe elingapheliyo kwi sampulu ngokubanzi. Ukusebenzisa ubungakanani bezesampula ezininzi kunomlinganiselo wokunciphisa imiphumo yabathathi-nxaxheba abangaqhelekanga ukususela kwimiphumo.
Imithombo:
Elmes, DG, Kantowitz, BH, & Roediger, H L. Iinkqubo zophando kwi-Psychology. EBelmont, CA: iWadsworth; 2012.
Hockenbury, DH & Hockenbury, SE (2007). Ukufumanisa i-Psychology. IYew York: Abapapashi abafanelekileyo.