- D& 3 Trang
13-VOi gia thie't nhl1 cau 12, Hay l10c 111Qng phl1dng sai clla so' han gA ban dl1Qc trong ngay.
a) 279,2094 (kg)2; b) 262,5872 (kg)2; c) 232,5872 (kg)2;
d) 272,5852 (kg)2; e) Mot con so khac ;
14- Voi gia thie't nhl1 cau 12 va gia sd' sau d6 sieu thi ap d\mg m¢t phl1dng phap ban hang moi lam cho doanh so' ban trung blnh la 3 tri~u dong/ngay- Hay ke't lub xem phl1dng phap ban hang moi co lac d\lng doanh so' ban trung blnh la 3 tri~u dong/ngay- Hay ke't lub xem phl1dng phap ban hang moi co lac d\lng lam tang doanh s6 ban trung blnh len hay khong? (ke't lu~n voi mtl'c y nghla 3%). Yeu du tinh gia trj clla tieu chu~n ki~m dinh va neu ra kGt lu~n.
a) z =-8,537. Phl1dng phap ban hang moi co tac d\lng lam tang doanh so ban trung blnh. b) z = -10,835. Phl1dng phap ban hang moi khOng lam tang doanh so ban trung blnh. c) z =1,537. Phl1dng phap ban hang moi khong lam tang doanh so ban trung blnh.
d) z = -11,097. Phl1dng phap ban hang moi co me d\lng lam tang doanh so' ban trung blnh. e) ca a), b), c), d) d~u sai;
15-Khao sat v~ tr9ng 111Qng cua mQt IO<:li trai cay, ta thu dl1Qc bang s61i~u sau:
I Tr9ng Il1Qng (gr) 100-200 200-300 300-400 400-500 500-600 600-700
I so' trai (nj) 20 50 140 110 70 10
Hay u'dc htc;1ng tr<;mg lttc;1ng trung blnh t6i da clla 10l1-i tnti cay nay vdi d9 tin c~y 95%.
a) 408,685 gr; b) 418,685 gr; c) 410,426 gr; d) 420,285 gr; e) m9t s6kbac;
16- Vdi sO' li<$u cho d cau 15 va nhung trai co trQng lu'c;1ng tren 400 gr Iii trai lo~i I. Ne'u cho rAng ty 1<$ trai 10l1-i I Iii 60% thi co ch~p nMn dttc;1C khong? (vdi mU'c ynghla 2%). Yeu du tinh gia tri clla tieu chua'n ki€m 10l1-i I Iii 60% thi co ch~p nMn dttc;1C khong? (vdi mU'c ynghla 2%). Yeu du tinh gia tri clla tieu chua'n ki€m dinh vii neu ra ke't lu~n.
a) z = -4,125. Khong ch~p nMn dttc;1c; b) z =-2,103. Cha'p nMn dttc;1C; c) z = -5,1. Chap nh~n dttc;1C; d) -5,103. KhOng ch~p nh~n dttc;1c; e) ca a), b), c), d) deu sai;
17- Vdi sO' H<$u cho (j cau 15 va nhung trai co trQng Ittc;1ng tren 400 gr Iii trai lo~i I. Ne'u cho rAng trQng Ittc;1ng trung binh Clla trai 10l1-i I la 550 gr thi co cha'p nh~n dttc;1C khong? (vdi mU'c y nghla 3%). YeU c~u tinh Ittc;1ng trung binh Clla trai 10l1-i I la 550 gr thi co cha'p nh~n dttc;1C khong? (vdi mU'c y nghla 3%). YeU c~u tinh gia trj clla tieu chua'n ki€m dinh va neu ra ke't lu~n.
a) z =-1,2314. Chap nMn dttc;1c; b) z =-1,8905. Cha'p nh~n dttc;1c; c) Z =-6,5114. Khong cha'p nh~n dttc;1c; d) Z = -12,1514. Khong cha'p nh~n dttc;1c; e) cit a), b), c), d) deu sai;
18-San pha'm clla m9t nhii may dttc;1C dong goi m9t cach ngh nhien theo qui each: 10 san pha'mlh9p. Theo bao cao clla nha may thi ty 1<$ hQp co 7 san pha'm lo~i I la 5%, ty 1<$ hQp co 8 san pha'm lo~i I Iii 20%, ty 1<$ bao cao clla nha may thi ty 1<$ hQp co 7 san pha'm lo~i I la 5%, ty 1<$ hQp co 8 san pha'm lo~i I Iii 20%, ty 1<$ h9P co 9 san pha'm lo~i I Ia 50% vii ty 1<$ hQp co 10 san pha'm 10~i I la 25%. Tien hiinh ki~m tra 1000 hQp chQn ngAu nhien tit m9t 10 hang g6m 20.000 h9P do nha may san xua't, ta dttc;1c ket qua:
sO' san ph~m lo~i I co trong m9t h9P 7 8 9 10
sO' hQp co sO' san pha'm lo~i I tttong ung 80 210 440 270
Bao cao ella nha may co dung vdi 10 hang tren khong ? Tinh gia tr! ct1a tieu chua'n ki~m dinh va dtta ra ket lu~n vdi muc ynghla 5%.
a) X2 = 27,3, bao cao khOng dung vdi 10 hang; b) X2 =16,81725, bao cao khong dung vdi 10 hang; c) X2 = 6,59722, bao cao dung vdi 10 hang; d) X2 =7,59522, bao cao dung vdi 10 hang;
e) eli a), b), c), d) deu sai;
19-Bieu tra m9t sO' san pha'm clla m9t xi nghi<$p ve chieu d[tl (X cm) va ham Ittc;1ng cha't A (Y - %) ta co ket qua: ket qua:
8 10 12 16
20 5 5 4
25 4 6 8 5
30 5 9 7 6
San pha'm co X ~ 25 cm vii Y ~ 12% Iii lo~i II. Neu mu6n ttdc Ittc;1ng ty Ie san pha'm lo~i II vdi d9 chinh xac 6% vii ttdc Ittc;1ng chieu diii trung binh clla san pha'm vdi d9 chinh xae 8 mm va ea hai ttdc Ittc;1ng co eung d9 tin eh 95% thl phili dieu tra them bao nhieu san pha'm nua?
a) 237; b) 203; c) 92; d) 48; e) M9t con sO' khae;
20-Vdi sO' li<$u eho (j cau 19. Hay ttdc Ittc;1ng ham Ittc;1ng cha't A trung binh ella nhung san ph~mco ehieu dai 30 em vdi d9 tin eh 95%. Gia thiet ham Ittc;1ng eha't A la d~i Ittc;1ng nglu nhien phan ph6i thea qui lu~t 30 em vdi d9 tin eh 95%. Gia thiet ham Ittc;1ng eha't A la d~i Ittc;1ng nglu nhien phan ph6i thea qui lu~t ehua'n.
a) (12,205- 14,569); b) (11,805- 13,769); c) (12,205 - 13,869); d) (12,614 - 14,069); e) M9i ket qua khac;
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