Ma'ana
Bambanci ma'aunin kididdiga ne da ke tantance yadda saitin darajoji ya yadu daga matsakaici. Ana lissafta shi ta hanyar matsakaita bambance-bambancen murabba'i tsakanin kowace daraja da matsakaici. Yawan bambancin ya girma, yawan yaduwar bayanai ya karu.
Yadda Ake Lissafta Bambanci
Ka sami matsakaici, ka cire shi daga kowace daraja, ka yi murabba'in kowace sakamako, sa'an nan ka matsakaita wadannan bambance-bambancen murabba'i.
Yanayin zafi na yau da kullum a cikin mako (a Celsius): 20, 22, 19, 21, 23
Matsakaici: (20 + 22 + 19 + 21 + 23) / 5 = 21
Bambance-bambancen murabba'i: (20-21)^2 + (22-21)^2 + (19-21)^2 + (21-21)^2 + (23-21)^2 = 1 + 1 + 4 + 0 + 4 = 10
Bambanci: 10 / 5 = 2
Me Ya Sa Yake Da Muhimmanci
Bambanci ginshiki ne don hanyoyin kididdiga da yawa. Yana tsakiyar ANOVA (binciken bambanci), koma-baya, da ka'idar jari a cikin kudi. Fahimtar bambanci yana taimaka maka tantance hadari, kimanta daidaito, da kwatanta amincin hanyoyi daban-daban.
A aikace, za ka saba ganin karkacewar ma'auni da ake amfani da ita don rahotanni saboda ta fi saukin fassara. Amma a bayan fage, bambanci ne ke yin nauyin lissafin da ke da wahala. Dabaru da yawa a cikin kididdiga masu zurfi suna aiki da bambanci kai tsaye saboda darajoji murabba'i suna da halaye na lissafi masu dacewa.
Bambanci yana auna yaduwar bayanai ta amfani da naúrar murabba'i. Don fassara na yau da kullum, ka dauki tushen murabba'insa don samun karkacewar ma'auni.