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reg, ,, TRUONG DAI HOC KHOA HOC TU NHIEN, DHQG- -HCM| MA LUU TRU f DE THI KET THUC HOC PHAN CRAGAGA- ¥ Hoc ky I— Nam hoc 2018-2019 MTHAO404 Tén hoc phan: Ly Thuyét Thong Ke Ma HP:__ MTH40404) Théi gian lam bai: 90 phat Neay thi:_od/at/gojg Ghi chi: Sinh vién {/B duge phép /O khong duge phép] sit dung tai hi lam. bat. Ho tery sink viet oy eg ees x os 2 ee aya eer aoa orp a eK BRE HO MSSV? scveees STT?! sup Cau 1. (4 diém) M6t cong ty san xuat xe 6-16 ché tao ra mot dong xe to Z, cng ty kiém tra xe bing cach cho 30 xe chay trén cling 1 doan duéng 100 km va do lugng x&ng sit dung X (Dv: lit), két qua cho 6 bang sau st Ivgng xAng tiéu hao 1A dai lugng ngau nhién cé phan phdi chuan. (a) U6c lugng ligng xang tiéu hao trung binh cla dong xe vdi dé tin eay 95% sp vao loai khéng dat tiéu chudn vé (b) Nhitg xe c6 lugng xing tiéu hao ti 4,3 lit tré len du nhién liéu, hay wée hong t¥ 1é xe khéng dat do nha may san xudt vdi dé tin cay 95%. c) Lai khang dink: "Litung xang tie hao trang binh ctia dong xe nay la 4,2 lit (tren 100 km)" ¢6 ) ig xAing iz ( dude chap nhan hay khéng? (Mite ¥ nghia a = 5%) (d) Khao sat long xaing tiéu hao Y (Dv: lit/100 km) cia mot dong xe W cing hang, tinh drige Y = 4,35 (lit) va sy = 0,2. So sanh mite xang tiéu hao cia hai dong xe Z va W. (Mite ¥ nghia a= 5%) C4u 2. (2 diém) Theo déi su phu thuoc gitta mau mat va mau t6e 6 124 phu nit 6 mot nude Chau Au ta 6 két qua sau: Mau t6e Mau mat ~~~ Vang nau | Nau | Den | Vang hoe Xanh 25 9 3 7 Xam 13 17 10 7 Nau muc 7 13 8 5 Vai mite ¥ ughia 5%, hay kiem tra gia thuyét cho rang mau cia toc va mau cia mat dc lap véi nhau. (Dé thi gam 2 trang) ang 1/2]