Heteroskedasticity itu apa sih? Jelaskan dalam bahasa sunda ya

Dina statistik, sekuen atawa vektor tina variabel acak disebut heteroskedastic lamun variabel acak dina sekuen atawa vektor béda jeung varian. Lawanna disebut homoscedasticity.  (Di Amérika, umumna dieja homoscedastic.  Hiji hal nu husus dina aturan ejaan Amérika nu leuwih ilahar tinimbang ejaan Inggris).

Waktu maké tehnik variasi dina statistik, saperti kuadrat leutik biasa (Ordinary Léast Square - en), jumlah ieu dianggap tipikal. Salah sahijina nyaéta watesan nu dijieun konstan nyaéta varian. Hal ieu bakal jadi bener lamun watesan observasi kasalahan asalna tina sebaran nu identik.

Heteroskedasticity (aka skewedness, lawan: homoskedasticity) ngalawan asumsi ieu. Contona, watesan kasalahan bisa robah atawa naek unggal observasi, something that is often the case with cross sectional atawa ukuran deret waktu. Heteroskedasticity is often studied as part of econometrics, which frequently déals with data exhibiting it. It comes in two forms, pure and impure. Because there are so many types of éach, most textbooks limit themselves to déaling with heteroskedasticity in general, or one or two examples.