Kule manani, ithetha ukuba umyinge wemathematika weesethi yamanani. Umyinge ubalwa ngokukongeza amanqaku amabini okanye amaninzi nokuhlula inani lilonke ngamanani amanqaku.
Cinga le nombolo elandelayo: 2, 4, 6, 9, 12. Umyinge ubalwa ngale ndlela ilandelayo: 2 + 4 + 6 + 9 + 12 = 33/5 = 6.6. Ngoko umyinge wenani elimiselwe ngu-6.6.
Kutheni Iingcali Zeengqondo Zinyamekela Ngendlela Ethethayo?
Ukuba uthatha iklasi yengqondo, unokuzibuza ukuba kutheni umfundisi wakho efuna ukuba wazi ngokubanzi malunga neengqinisiso ezinjengeentetho, imidian, imodeli kunye nebala. Isizathu salokhu kukuba izazinzululwazi zisebenzisa ezo manani ukunceda ukuqonda ingcaciso eqokelelwa ngophando.
Khawucinge, umzekelo, ukuba isazi sengqondo senza uphando malunga nemikhwa yokulala phakathi kwabafundi beekholeji. Uhambisa ifom kwi- sampuli engahleliyo ye-100 yabafundi baseyunivesiti kwaye ubenza balandelele ukuba balala njani ubusuku bonke ngeentsuku ezingama-30. Emva kokuba yonke le datha iqokelelwe, unolwazi oluninzi malunga naloo nto iqela labafundi abalala ngalo lonke ubusuku busuku, kodwa ngoku kufuneka aqikelele le ngcaciso kwaye afumane indlela yokuyiveza ngendlela enentsingiselo.
Izinto zokuqala azenzayo zijonga ngedatha eqokelelwa kumfundi ngamnye ngamnye.
Unokufuna ukujonga izinto ezifana nohlu lweedata (inani elincinci lokulala umfundi ufikelele kwinani lokulala komfundi), kodwa enye yamanani amancedo afuna ukuwujonga ngayo isilinganiso ubuthongo obunokuthi umfundi azuze ubusuku bunye ngenyanga.
Ukuze ufezekise oku, uza kuqala ngokunyusa inani ngalinye aze ahlule inani lamanani eenkcukacha. Kule meko, inyanga yayinemihla engamashumi amathathu, ngoko ke iya kwandisa iiyure zobusuku bobusuku ize ihlule inani eliyi-30. Le xabiso ibonisa intsingiselo, okanye umyinge ophakathi, iiyure zokulala apho ngamnye umfundi echazwe ngaphezulu kwikota yenyanga.
Xa sele ebalwe intetho kumfundi ngamnye, unokufuna ukuxela uluhlu lwexabiso, i-median (okanye inamba elandelwa rhoqo), okanye ukudibanisa zonke iinombolo zibe ngiselo jikelele kwiqela lonke.
Iimilinganiselo zeCentral Tendency
Ithini yinto efana nomlinganiselo omnye wokutyekela. Ngamanye amazwi, iingqondo zeengqondo zidla ngokukhawuleza ekujongeni indlela amaphupha eenkcukacha athambekele ngayo kwiqela malunga nexabiso eliphambili. Ngokuqonda le xabiso eliphambili, abaphandi banako ukufumana ingcamango engcono malunga noko kuthethwa kulindeleke okanye kuqhelekileyo kwiqela elithile.
Njengoko usenokuba uqaphele, ithetha linokuchaphazelwa ngamanani amaninzi. Ukuba amanqaku amaninzi athetha ukuwela kwinqanaba elithile kodwa amanqaku ambalwa aphezulu okanye aphantsi kakhulu, oko kusenokuthi kungabonakali kakuhle oko kwenzeka ngokwenene kwedatha.
Cinga ngamabanga akho kwiimviwo kwiiklasi zengqondo, umzekelo. Khawucinge ukuba uthathe iimvavanyo ezine ukuya kuma-96 ekhulwini, ama-98 ekhulwini, ama-94 ekhulwini kunye nama-100 ekhulwini. Ngelishwa, awuzange uzive kakuhle phambi kovavanyo lwakho lokugqibela kwaye ungenalo ixesha elaneleyo lokulungiselela nokugqiba ukuvavanya uvavanyo ngamanqaku ama-14 ekhulwini. Ngoxa ezinye iimvavanyo zakho zimelela umsebenzi oqinileyo, eloo manqaku aphantsi kakhulu ahudula amanqaku akho aphantsi ukuya kuma-80.4 ekhulwini. Ngenxa yeso sizathu, uphando lunokubukeka kwinqanaba eliphakathi, okanye amanqaku amaninzi amaninzi kwi-data set, njengendlela yokugqiba ukutyekela.
Unokufunda ngokubanzi malunga nendlela yokuchonga nokubala i- mean, median, kunye nemodeli .