Lipalopalo tsa Motheo tsa ho Fokotsa Maikutlo: Tlhaloso, Mekhoa le Litšebeliso
Lipalopalo ke saense e ithutang mokhoa oa ho bokella, ho sebetsana, ho sekaseka, ho toloka le ho hlahisa lintlha. Lipalopalo li arotsoe ka makala a mabeli a maholo ka bophara: lipalo-palo tse hlalosang le lipalo-palo tse hlalosang. Lipalopalo tse hlalosang li shebane le ho hlahisa le ho akaretsa lintlha ka mekhoa e utloisisoang habonolo, joalo ka litafole, likerafo, le litekanyo tse fapaneng tsa tšekamelo e bohareng le ho hasana. Lipalopalo tse hlalosang, ka lehlakoreng le leng, li re lumella ho etsa likhakanyo kapa ho etsa liqeto mabapi le baahi ho latela lintlha tsa sampole.
Lipalopalo tsa ho nahana ke lekala la lipalo-palo tse re lumellang ho etsa qeto kapa ho etsa liqeto ka baahi ho latela lintlha tse nkiloeng sampole. Tšebeliso ena ea bohlokoa hobane hangata ho ke ke ha khoneha ho bokella lintlha ho baahi bohle. Ka mekhoa ea lipalo-palo ea ho nahana, re ka etsa likhakanyo kapa likhopolo-taba ka baahi le ho lekanya boemo ba kholiseho likhakanyong tseo.
Kutloisiso ea Motheo le Mehopolo ea Bohlokoa
Baahi le Mohlala
– Palo ea baahi: E bolela pokello eohle ea batho kapa lintho tse etsoang lipatlisiso. Mohlala, liithuti tsohle univesithing.
– Mohlala: Sehlopha kapa karolo ea baahi ba khethiloeng bakeng sa lipatlisiso e le ho etsa liqeto ka baahi bao. Mohlala, baithuti ba 100 ba khethiloe ka mokhoa o sa reroang univesithing.
Liparamente le Lipalopalo
– Paramethara: Ke boleng ba dipalo bo hlalosang tšobotsi ya baahi (jwalo ka karolelano ya baahi).
– Lipalopalo: Ke boleng ba dipalo bo hlalosang tšobotsi ya sampole (jwalo ka karolelano ya sampole).
Mekhoa ea Lipalo-palo tsa ho Qetela
Ho na le mekhoa e fapaneng ea lipalo-palo tsa ho nahana e sebelisoang hangata, joalo ka:
1. Khakanyo ea Liparamente
– Khakanyo ea liparamente e kenyelletsa ho sebelisa data ea sampole ho hakanya (kapa ho bolela esale pele) boleng ba paramente ea baahi. Ho na le mefuta e 'meli e meholo ea khakanyo:
– Khakanyo ea Lintlha: Khakanyo e le 'ngoe ea paramethara ea baahi. Mohlala, ho sebelisa karolelano ea sampole ho hakanya karolelano ea baahi.
– Nako ea Kholiseho: Mefuta ea boleng bo nkiloeng kapa bo lebelletsoeng ho ba le boleng ba paramethara ea baahi ka boemo bo itseng ba kholiseho.
2. Teko ea Khopolo-taba
– Mokgwa wa ho leka kgopolo-taba o kenyeletsa dikgopolo-taba tse pedi, e leng kgopolo-taba e se nang thuso (H0) e bolelang hore ha ho na phello kapa phapang, le kgopolo-taba e nngwe (H1) e bolelang hore ho na le phello kapa phapang.
– Teko ea khopolo-taba e ikemiseditse ho fumana hore na ho na le bopaki bo lekaneng bo tsoang data ea sampole ho hana khopolo-taba e se nang thuso ho emela khopolo-taba e 'ngoe.
– Mehato ea tlhahlobo ea khopolo-taba e kenyelletsa:
1. Bolela dikgopolo-taba tse pedi (Ho le Ha).
2. Khetha boemo ba bohlokoa (alpha).
3. Bokella le ho sekaseka lintlha.
4. Fumana boleng ba p kapa lipalo-palo tsa teko.
5. Etsa liqeto ho latela boleng ba p le boemo ba bohlokoa.
3. Tlhahlobo ea ho Fokotsa Khatello
– E sebediswa ho utlwisisa kamano pakeng tsa diphetoho tse pedi kapa ho feta.
– Mohlala o bonolo oa ho khutlela morao o kenyelletsa kamano pakeng tsa phetoho e le 'ngoe e ikemetseng (ponelopele) le phetoho e le 'ngoe e itšetlehileng ka eona (karabo).
– Mehlala e mengata ea ho khutlela morao e kenyelletsa mefuta e fetang e le 'ngoe e ikemetseng.
4. Tlhahlobo ea Phapang (ANOVA)
– E sebelisoa ho bapisa mekhoa pakeng tsa lihlopha tse tharo kapa ho feta le ho fumana hore na bonyane sehlopha se le seng se fapane le tse ling.
– ANOVA ea tsela e le 'ngoe e kenyelletsa ntlha e le 'ngoe kapa phetoho e ikemetseng, ha ANOVA ea tsela e 'meli e kenyelletsa lintlha tse peli kapa liphetoho tse ikemetseng.
Litšebeliso tsa Lipalopalo tsa ho Qetela
Litšebeliso tsa lipalo-palo tsa ho nahana li ka fumanoa masimong a fapaneng, ho kenyeletsoa:
– Bophelo bo Botle: Ho fumana katleho ea mekhoa ea phekolo e mecha ha e bapisoa le mekhoa ea khale ea phekolo.
– Khoebo: Ho lekanya khotsofalo ea bareki le ho etsa likhakanyo mabapi le thekiso ea nako e tlang.
– Saekholoji: Ho lekola katleho ea phekolo kapa ho kenella ho ntlafatseng boemo ba kelello ba mokuli.
– Thuto: Ho lekola katleho ea lenaneo le lecha la thuto kapa mokhoa o itseng oa ho ruta.
– Saense ea Sechaba: Ho sekaseka lintlha tsa lipatlisiso le ho etsa liqeto mabapi le boitšoaro ba sechaba.
Lithuto tsa Nyeoe le Mehlala
Mohlala oa ho kenya tšebetsong lipalo-palo tsa ho nahana, mona ke thuto e bonolo ea nyeoe lefapheng la thuto:
Thuto ea Nyeoe: Katleho ea Mekhoa e Mecha ea ho Ruta
Mosuoe oa lipalo sekolong A o ne a batla ho fumana hore na mokhoa o mocha oa ho ruta o sebetsa hantle ho feta oa khale ho ntlafatseng ts'ebetso ea baithuti. Ho etsa sena, o sebelisitse lintlha tse tsoang lihlopheng tse peli tsa baithuti: sehlopha se seng se rutile se sebelisa mokhoa oa khale oa ho ruta (sehlopha sa taolo) 'me se seng se sebelisa mokhoa o mocha oa ho ruta (sehlopha sa liteko).
Mehato ea Tlhahlobo:
1. Tlhahiso ea Khopolo-taba
– Ho: Ha ho na phapang lipakeng tsa lintlha tsa liteko tse tloaelehileng lipakeng tsa lihlopha tsena tse peli.
– Ha: Ho na le phapang lipakeng tsa liphetho tsa liteko tse tloaelehileng lipakeng tsa lihlopha tsena tse peli.
2. Pokello ea Lintlha
– Bokella lintlha tsa liteko ho tsoa lihlopheng ka bobeli.
3. Tlhahlobo ea Lipalopalo
– Ho sebedisa teko ya t e ikemetseng ho bapisa mekgwa e mmedi.
– Kgetha boemo ba bohlokwa (mohlala, alpha = 0,05).
4. Palo le Tlhaloso
– Bala boleng ba lipalo-palo tsa t le boleng ba p.
– Haeba boleng ba p < alpha, hana Ho. Sena se bontša hore mokhoa o mocha oa ho ruta o na le phello e kholo. Qetello: Lipalopalo tsa ho nahana li bapala karolo ea bohlokoa tlhahlobong ea data le ho etsa liqeto. Ka melao-motheo le mekhoa e boletsoeng ka holimo, re ka etsa liqeto tse nepahetseng 'me ra etsa liqeto tse betere, tse nang le tsebo e batsi. Ho tseba likhopolo tsa lipalo-palo tsa ho nahana ho tla ba molemo haholo, eseng feela lithutong tsa thuto empa hape le bophelong ba letsatsi le letsatsi le mafapheng a mang a fapaneng a litsebi. Ka hona, kutloisiso e ntle ea metheo ea lipalo-palo tsa ho nahana ke mohato oa pele oa bohlokoa bakeng sa mang kapa mang ea amehang tlhahlobong ea data le lipatlisisong.
