SO BINH QUAN

-sbq thog ke bhien muc do theo tieu thuc so luong trong 1 tog the bgom nh don vi cung loai

-y nghia

..dug trong cog tac ngcuu nham neu len cac d2 chung of cac htuong kte,xhoi so lon trong dkien t,dia diem cthe:gia thah bquan,nsuat ldong bquan

..de ngcuu cac qtrinh bdong theo thgian,nhat la qtrinh sx de thay dc xu huong ptrien co ban of cac htuong so lon

..so bquan chime 1 vtri qtrong trong viec van dung nh p2 ftich thke :dtra chon mau,du bao,ftich mlhe

-dkien van dung

..chi dc tinh tu nhug tong the dong chat(vi cheh lech ve luong ca the giua cac dvi o lonlam(vi bchat chug la giong nhaua)neu co su cheh lech cug la do nhan to ngau nhien tac dong.viec su dung so bquan se bu tru cac nhan to ngau nhien nay va no se dai bieu cho all cac muc do khac nhau of tong the

..so bquan chung can dc van dung voi8 so bquan to va day so phan phoi

vi...

.neu chi xem xet qua so bquan chung-moi cheh lech se bi san bag ; cac dv co muc do cao thap khac nhau deu bi che lap dieu nay dan toi

.hche tac dung of viec ftich thong ke

.o gthich het nh ng,nhan,xu huong ptrien of htung,co the dua ra nh kqua,trong khi nvu of thogke la fai tim hieu muc do dai bieu chung,di kem voi viec tim ran h nhto tien tien ,mam mong moi fat sinh hoac nhug bo fan lac hau dag kim ham su ptrien