oi rnr na0N r x(c su.{r rndNc r0 n Mi mon hoc : 1001020 Dd 5, gdm 02 trang. Thdi gian ; 60 dhtr ' Kh6ng sfdrps Ai UCu C6u 1: Mot nhi' lody sar suit linh ki€n dien trl vdi tl lQ sln phdm .rar deu chudn D 80%. eua KCS (Khau kidm aa ctrft lrrong sdn phdm), rrlor linh kien dat ri€u chutn dugc ch{p nhln vdi xac su{r 99%, mor tinh ki€n kh6ng d4t tiCu chudD bi lo4i b6 vdi xdc sut'r 95%. ?). T!!! d 16li!!h lder d?t de'r.h'rdn sa'.t KC-s. !0,V b). Ttm xdc sufi KCS kCi tuAn dfns. !g!2:'fudi rho cria m6t lo4i c6n rrong neo dd lA mot bion ng6u nhi€jnX(ddn,tiL thdbg vdi him met d6 nhtJ sau : neu .tE lu;41. "\ n- L* -dL b). Qtran sdr ngau nhiCd 4 c6n trung, tlnh xtc sudt chl c6 2 coo sdog qua 2 thrdg. c). H6i trung blnh Dhii quan sdt nlSu nhi€n md'y con c6n trDng ttd sau hai th6og aung blnh cd 22 con sdng s6t. (Xein riec quan 6dt c6n trdng Ia doc lep nhau) Q!g!: Dd nghi€o crlu sd enh hudng cla phan b6n (X) rtdn ning su{r lta (y), 4gddi ra ti6'n baDh thl ngbiem tren i00 mdnh nrgng vi thu dfgc kgt que nhu sau : a), U-dc irJdng trang suai iUa trung birh hCn mor rtrenh ruotrg vdi d0 ttu cay 95%. , b), N6u n6i rlng d le neoh ruong dat neng suft tU l50kg ftd rcn D 80% tbt c6 ddog ' kh6ng? Cho kdt luan d mr?c y nghla 0,05. c). Tim phrtdng trtnh hrong \htgng phen bdn \ "tttl Ntrng \ sudt hla Yrke\ \ l0 t2 l4 l6 100 22 150 8 l0 3 200 14- IJ 250 lo DH Srtphgm ky thugt Tp. ECM Khoa Khoa Egc Co Bdn B0 mon Todn (D= {k'(4-' ( I ' .quan tuydn tinh giiia ni;g su{t lrta vdi ludng phan b6n, (Gie thiei Y c6 pMn phdi chua'd) 6hi chrl : B{ng tra cdn thidt cho phla sau dd rhi. Ngay 29 thdng 05 ndm 2004 BO MdN DUYFT, I Cau I. C6 h:li Id hrint. L6 ihf nhdt chdh 5 sin phdm loai I vir 3 sin chdm loai U. LO tht hai chria 6 sen phCrn loai I vi 4 sin phdm loai II. Ldy ngtu nhien ti]mdi 16 I san phdm. a) Tinh xdc sudt dd lI) dudc 2 sln phdm ciurg loai. b) 86 2 salr phir (r; lai dudc veo ld l, rdi ldy ngau nhien 2 sin phem tt ld nty. Tini xdc * suri lav duoc 2 sin oh;im khdc loai. c) Bi6r trong cdc sin pidm ta'y ra cO it nrrait I san phCm loai l. Tirlh ric sual dd lty dr,oc siin - phdm loai I crla 16II. d) Coi ]( l;r so sin fhlim lcq.r I trong 2 sin phdm ljy ra. Tinh ki vgng var phudnS sai cia X. ( t I -). - -8.< Cau II. Krdrn F3ludi tho cua mdt sd bdng den dc nh} mdy A sin xudt ta thu duoc barg sS li€'J D,lI HOC SIJ PHAM K.t. THUAT TP. HCM KHOA KHOA HQC CO BAN BO MON TOAN _____r._____ Ghi chri: c:in b6 ,)oi rhi khdng giii thich dd thr. Dt THr MON: xLc suAr rH6NG Ko Ma mon hoc: 1001020 Dd thi gdm I trang Thdi gian 60 phft Khong duo,,c srr dUng rli lieu 56 b6ng Biei tuiii tho b6ng den c6 phan phaii chudn. a) Hay tim khoeng hn ci), cia tLrdi tho trunt binh cia cic b6rg ddn do nhtr mey A san xua't ,si da tin 1y 95q b) Voi mfc y nghir 37o, dq a vio s6 fieu da ihu duoc, c6 thC ke't luan rudi thq trung binh cria cdc b6n8 dbn do nhe' m6y A sen xutt le 5700 gid hay kl6ng? c) Hey tim khoing tin cay cira ti le bdng din c6 tudi tho tren 5796 8id voi d6 tin cay 987 d) Vdi muc i rghia 17., dlra veo sd lieu dA (hu dudc, c6 thC kgt luan t:i l€ b6ng ddn c6 tutii tho dndi 558C gid h 10qo hay khong? MOt sd sid tri cdn thi.l cia hdnt Laptace *@ = h [" -,: 2 dt cho tt'ong bdng sau Ngiyisthensosnenr 20!6 TrLIdng bd r:ror 0 I 2 4 6 7 8 9 1.9 0 17128 0.47 t9: 0.1725i 4.473200.473810.4744i 0.4?5000,4?558 0,476154,47610 0,.1E214a_482510,481000.48341 0.483820.484220,484610,485CU 0.485370.,+85?4 2,3 cr.48928 0.48956 0.,14983 0.49010 0,490361r,4906i 0,19086 0.+l il i 0.49t340.!t9l5E 0,49379 0.493q6 0.49411 0,49430 0.49,46 0.49461 0,49477 0 i9491 0_49506 t95ZO '-,r*tg "l,i;t r,,/r ,1n, C6u 1 : Cho 3 16 linh kiQn A,B,C g6m rA't nhi6u linh ki€n, tl 16 linh ki€n h6ng 3 m6i 16 . Un lwt h 0J; 0p8; q05. a) Til 16 A chgn ra 3 linh kien. Tinh xrc sudt duqc thi6u nlqAfinh kien tdt. b) cii s'! m6t llgrrni ddn nna ngiu nhi€n I li kien ti mot cia hang b[n l-gglj linh ki€n Sdrn: 500linh.IiQn 1,hrr6c lJ A. 300 thudc ]6 B. 200 Lhu6c lo C Tinh er. .,!Ar no,r,i niu 6tr" ,i'r,1" li";;;;dt CA',r 2 : Tndi th9.c.ls FlO! lo3i c6!r t!,)!g !e hiF; n8;u nh;€n li6n ruc X{thdngr cd ham m4r oQ xac suar: DAIHOC.SI'PHAM KY THUAT TP.HCM KHOA KHOA HQC Cd BAN BO MON TOAN Ei rHr MON: xic sufT THdNG KE A Ma m6n hgc: 0001020 Dd thi sd 02 c6 02 rang Thdi gian 60 phrit Kh6ng ddgc ding tli lieu hoc m6i ngiy cria sinh (1 f(.i=la('x'-x') xe[o'+] n l9'.\fr t^r-1-o \qloal v) ! 'l "' s) vidt h:rn pha! phdi c,.ia X 50O b) Tinh d te c6ng rring cd luiii tha chua d&-2 tbdng rudi ron8 sd cdi' trDng c6 ru6j $Q r l $5nc trd l6n. .r. lorg45 Cfur 3 | I*reo s6t lddng thdi gian td hQc trong mot ngay tr6n mOt sd sinh vi6n' ta-c6 kdt .'ni: L A : L A ! f" e- b 90r. Cau 4 : Di6u tla vC benh vi6m phdi ogddi ta tha'y : trong 100 ngfi,i bi-vi6m pldi cO@ nSfiJi kh6ng hit thudc ld, ffong 900 ngddi khdng bi vi€m Ph6i cd 100 ngtJdi kh6rg hdt thudc ld. l{6i bQnh vi€m phdi ve viec h{t tIu6c 16 cd fie kh6rg? Cho k6t luan d sF5%. Ghi chd : Btrng tra can thiei cho phia sau dd thi. m 2005 G-, -7 I)1 Tim ktoing dn cAy vien. tr1lng btnb htd.lg thdi Sian Ngey 9 thdng E0 mdn vCt K!,) t1 /' r Da, N* t+; -( TflJdng DH Sd Pham Ky Thuar Khoa Khoa hoc cd biin BO mon : TOiN , DE THIMON )LiC SUAT vi THONG K8 TOAN - A Thdi gian; 90 phft, ngAy thi: l0/01i2003 Q!g-! : M6r cfa hing bdy bdn l0 sen phdm cung loai t ong d6 cd 6 sin phdm do td I sen xuai va 4 s6! phdm do rd 2 san xudt. Ngey h6m trddc, cr.ja hdng dA bdn dddc 1 sAn phdm. Ngny hdm sau c6 mot kh6ch hdng ddn mua 2 sAn phdm. a). Gqi X lA sd sen phdm do td 2 sdn xua't hong sd 2 sdn phdm mA ngdaii khdch mua ngay h6m sau. tlm phan ph6ii xrc srr,i cfia X ir). i'ilir xic sut't tid cho uong 2 sdn phdm ma krnch mua ngdy hom sau c6 it nhat I san phdm do td 1 sdn xr,it. C€Ul?: M6t loai b6ng dien c6 tuiii tho X ( tinh theo d.tn vi nrn!) !i r!6r ti6!! ngiu nhi€n.6 hlln phAx Ph6'r : 0 neiu x<0 arr+i+b ndu 0<x<2 vdi a.bllhlngsd z L ndu x>2 a).'nm, vi b b). Vdi a, b tim dudc, &rh tudi rho rrung btnh crla loai bdng dien trCn. e6qj : O 2 thdi didm thrng l-2002 va thdng 6-2002, chi cuc tieu chudr do ltJdng cbA't ldqng da kidm m hQng lddng ghi trCn bao bl cfa mQt sd ld hing d6ng g6i sd'n t4i nhi6u siCu rhi vA c6 kdt qua sau dav: I not ulem a), Hiy so sdnh ti i6 16 hdng ddng g6i s6n bi can thidu d 2 rhdi didm tr€n vdi mBc j nghia cr=0,O5. b). Hay rdc ludng ri l€ 16 heng d6ng gdi sio bi can thiel d rhdng6-2002 vdi d0 th cay 95%. Ndu . i 6u cdu ltdc iir'v'rig ii€u pirrli dai riQ iin c.4y 99Vo va d6 chinh xdc i1./a thl phdi iie'm tra Oao r)hiCu 16 heng ? eA!-!l : DO bdn trurg binh ti6u chudn cria mor loai thep h l13 kg/r!m2. Sau khi cii tidn crich luy€n thdp, nglliti ta kid sd sdn ohdm m trr m6r sd sdn pham thep lamravd hu drJdc s6 lieu sau dev : DO bcn fks/mm']) r05 110 115 120 125 Sd sdn phdrn t5 30 25 'l (gid thidt rlng dQ bdn cria th6p li mot bidn ngau nhien cd phan ph6i chudn) a). Hdy cho k€i luin vC hieu qua c aviecceiridnc6chluyOnrhepvdimfcynghiaCt'=0,01. b). Hay ddc ludng d0 bdn rung binh c0a thdp sau c6i tidn vdi dO tin c6y 95Va. Chi chti : Khong sB dung tdi he'r khi lem bii. Bdng tra cin thidt cho phia sau d0 thi t.lldn8 b,\ mon duy6r i I.lx, = l t DO rO nang Dl can tnleu Thrng l-2002 '19 JI 44 1 ,' I i DAI HQC SIJ PHAM KYTHUAT TI.HCM KHOA KHOA HOC CCJBAN BO MON TOAN DE THI MON: XAC SU{T ]H.iNG KIr, A MA mOn hoc: 0001020 DC thi c6 02 trang Thdi gian 60 phit Khong dirdc dtlng tii liCu CAu 1 : Mfl tr+m ctru hda o vitng A c6 3 xe chrra chiy, vi sd cuoc goi cdn ddn su girip d0 cia xe chna chdy crla ram la bidn nge0 nhien uAn theo lual phir ph6'i Poisson vdj lham sd ld 1,8. Giri rhidt ring m6L \e chi dip rlng d;oc 0l cu,ic gor rrong m6r 'rgr v a). Quao sit ngiu nhien m6t ngAy tai tram, tinh xdc sud't dd ngiy ,16 khdng c{i xe nio phei dem ra drlng. b). Tinh xdc sutt trong 02 ngey liin ridp rram dirng nhidu nhei 02 xe. c). Ti le cdc ngiy c6 cu6c goi md lram ki6ng thd ddp r?Ilg duoc U bao nhrCu? d). Gili srl do lhdi ddt thay ddi (khi hAu n6ng telr). ngddi ra ghi nhen dddc ti le cdu ngay cd it nhal01 cu6c goi dci rram li 99./ Theo anh (chi), rram cdn rlng bi ii nhil bao nhieu xe rhi s€ ddp fng dudc yeu ciu chrla chdy? CAu 2 : Dd chu6'n bi cho trd chdi "Chung sfc", ngddi ra ra mO! cdD h6i vdi ba ddp itn ( r). (21. (3) \,:r rh6i1 k6 cau trri liti cria 100 neudi nhusau: Ddp an (l) K}I6ng chon dip in nio a) l'im khodng udc ludng cho ri ie ngLtili chon dtp dn (I) vdi d6 tin c4y 997. b) Theo quy dinh ngu ti ld ngfdi kh6ng chqn dip 6n nio kh6ng qud 27. rhi kCr qud Ihdng ke sC dLldc sf dung cho ho chor. Vrli mi'c i nghla 57,, arh (chi) hiy cI-, bi6r kA gui ren sf dung dddc kh6ng' Ctu 3 i Nghien cflr him luong Vitamir A (7.,) cia mot hai trri cay ta thr duilc k& qud Him ld.jng Vitamin A I i-: 10 8 1 Gie rhi& ham ludng Vitamir A cia loai ilii crt), niy rrAn lheo luiL chue'n HIy tim kioang dn cay 927. cho hAm lrrcjrg Vitamin A !rung blnh tr Neu mu6n ddc ludng lrCn c6 sai sd kh,lng qrI 0,2 7. thi cd cdn kn6ng? Ndu ci'n thi ph:ii q!an stit rhein i{ nhA't bao nhiSu rral? Ghi chf : Bing tra can rhiil oho phla sau de rhi. Ngiy 29 thdng 12 B0 m6rr m0! lrei. sdr lhem 56 nrudi i 5l Hirm lddng Vitamin A (7.) 4-5 5 78 5-6 12 8-q 6-1 110 i9-10 D'4'g +e DE IHI MUN : XAC SUAT VA THONG KE TOAIq B Thdi gia! lem bai : 90 phit Q!.q! : M6t c6ng nhdn di6u kidn 6 md1' d6!, cdc mdy ney boar dong doc lap vdi nhau vA xdc suei bi httcira m6imiiy trong cdc ca llm vi3c le 0,1. Tinh x{c su{idd cho rrong ca lirn- vrec I l). C6 dnn-g 1 mey bi hu. 2). Tft ci 6 mdy ddu hoat d6ng rdt. 3). C6 it rbdt 5 mdy hoat ddng rdr. (-tu If (.h^ hiF,, "d;, "1,;- Y ^,i L'aF nlt6 r " - ."" '? i F(.) = ] I t Chr W l asinft:t+b,0<x <:- Tr!-dng t)l ISI']KT Knoa : KI{CB B0 m6n |'lo.i .i 2. v,,, r h li .ji, hipq (o. jl. iXli, l".}" rim ddgc, rim hem mer do cia x vi rinh k! vong ro:in cri.r X CAu lII : D€< nghiCn cfu rinh hinh thdc hie! Phep l6nh hanh nghd y dudc [rnharr A mOr rhenh phd., ngrldi ta kidm ira iigi-,: ;.ji€rr rrrir sdc(, sri blnh nghd dddc rrong nAm 2(-100 va Z00l va c6 kdt que nhd sai, : Nem Sd co s6 dr-roc kidm tra Sdcd sd !i phsm PhdD tenh 2000 200 i 1319 2029 319 3ut t). lt;iy so sdnh ti iC ccj sd hanh nghd al,i,r. .d vi nh.h Phji ldnh rcng : nSnr 2000 .,,i 2001 v(iilniic y nghia o=0,05. 2). ftay (atc ludng ri le cd sd hanh nghe dfdc c6 vi pham phdp lenh ftong nem 2001 vdi d6 rin cay 9576. : .Sin lddng trung binh cria giSng l{a rruydn rhdng rdng tai ving A le ,18 ralha. Ngudi ta dra vr\o tr:dr!{ thi didn mOr gidng lua mdi ren 100 rhfia ru6ng cria ving d6 ve cd kdt qua nhd SAn liJdns ftalha Sti chr?a ru6ng i thift riog sen llJdng lia ld mQr bidn ngdu nhiCn cd phan phdi chudn) I(riy so senh sen ludng lrung binh cria gidng hia mdi vdi gidng lrla rr,.rydn rh6'ng vdi mrlc I rr-etria cr=0,05. I'triy udc irtdng seo ludng trung bi c|.ia gidng lta mdi vdi d6 tin cey 952o. (tL L). '). a.lhi chL i Thi sinh chi drJdc mang rheo ciic bdng sd vi ndy tir,h cdm tay. ., /: I rddne b6 rn -)rL q 1 o I n L t1 Nqrva" r-1,i Nd - / - -" -di!4 JeaL Ta c6 bing s6 li€u t' DI, THI': XAC SUAT THONG Thdi riari: 90 nhJ t : kg; ve chidu cao (i : cm ) cria sau i nhn q .Lde-lhi rdm rn6t ciich trd ldi 6 iwdng. KE lron! mo( 13lr Ilrltf:lc osl)!cnt /\llrl villl. Inr)l slnn vlcn Ufr;d](tj MOL.i,, h,r, c(i 4 cac-tr tcr't-[r.ti (trong dtr chi cci dU ng). Kdt qr:i tri ldi ciic clu h<ii ddc lip vrli nhau. Didm bii tbi cdc cAu trd ldi dring. blng dng sd l. Sin! vien A kbdng thuOc biivA rd k'Ji ciicciuh6i motcdch ngiu ', i - d, ,|'a ., rurrslL r Ul|l ' a) Sinh vi€n A bi didm lier ( < 3 didr; ) ? 5; Sin-h i:ir .^. d3l dlanr d6u .,dr,i = I di6'm r ? ^, 2. Shh vi€n B hoc thuOc 4 c6u di u. HA], tinh XAC SUAT dd sinh-vi6n B ,l-' ,{iA- I^- i ^iAi , : (l ,ii- , ) I T IUU N slnn ",) 30,34,- t4 - 3l{ 4u 38-42 4\i t\q i4s .{s1 ' L Hny ir<ic iLt<ing chidu clo trLrng binh cria I hoc sinh c6 trong irJgng trong kbodng ( 34 - 38 ) kg trong roin rrddng vdi d6 rin cey 9570 ?' n r 'i, - 2 'l-rm phddng lrinh tudns (luan tuv6'n tinh cria Y thco X ? r' - \J 3. N€ir n6i ring : ChiCrr cao rruns binh crla mdt boc sinh rrrr<)ng niy F, t.(. li 1,48 rnrlr)cticb5'pr)l'indd(jcl$6ng(o.= l7o).'l v. v,\ jt J 4. DC ddc lLtdng trbng lddng irung binl crla I hoc sith {rong toen , r\ trddng vcli sai sd 0,6 kg th) dd Lin c5y dar bao ohi6u Zo ? n't " |, .rff,{y 1.r) : i_r -: !c.) !l /l Ghi ch-ri ; Sish vi€n dddc si durg bzing str' A, B, C vi bing Lrim r,{t cdng thric xric su{t rltdng ke dC lrnr bai. t: .l , ./rl n r1rl'' '.^'-:2A') 3. :,r l'l - !\r.,i |')'l Di 'r'Ilr x,ic xrj^l" r0Nc t(0 'l hiti itt0)X 90 tt\it. A:x ^Cl!4j: Cii 2 kien l)ing. nrdi kiirr cri 5 srin phiirn. Kii-n thr I c(t 2 s.rur ph;iu' loai A. kien llrri 2 a(t I s!i,r phiin' l!)ai n. l/' t-hon nliiiu Dirien i kian rdi Lai i i,:i,'.jr !i,u! i:;J ',giir 'ri,i€,i i;, I si;., pl:ti;:r. 'lirn xric suiii.'di s:ir 1 hiirn n:rl li loai A'l 2/ t-ir ngi! rlhien I s;in plri'ru ij kjeD tluf nhait vi 2 s?in pbinr rir kien lhl2. 'i-|ltr r;ii rir: ;;lrih: lr::i ,^ lirr !i!i,j rli !!r)!! 3 (; D nhtiin lil' r. tn 2 ki6n ] I]jIr(jNC ripi Cho X (lin vi {inh = cnr) var Y (ddn vr LiDir =i(gl lii 2 ciri ti6u ch.iil itrong crln j lLL ,r1'lr.irrr.n,l't.:,,ils;.,irr plrin' trr c', t<a.r r1r.i clrn,"r b.l.rg srrrr )4 t( l/- llnr pllnjrrg tr)rrh trrung qrrrr tuyCittiDh ntiu ciia 2/.Cirlc rliirr pirii,ii cJ ciri iiCii X irir0lxin 24crrr .,'ir ch! LI(]c lLitt)g ti 16 srio lrhii"nr loli 2 cri d6 tirr cliy 987o I 3/- l)0 u11c'lLi(rng ti lC srirr lrtrCrn Irli 2 vrli d'j chirrl) xrii- 29. var cilir cl)i tieU X v(]i d0 chirh xIc 5nrnr vtii cil0g d,i tiri ciiy 9-570 bao rrhiCu sin piriirn riia ? 4/. (;jii sia sru d(i tring I crii li6n ki lhuirl ngliili tr thi)' pi:1 iri trng biDil cLir chjlreu Y lir 1j,5kg. Vr,i nriTc i |ghiii o=0,1) L lliiy chrr nhiu xdt i i cr'ii liin,ki thuit d(i'l XthcoY/ Liou \. rlxl L'jn 8kg I:r lo:ri 2. lnlc lri(tng lnru!l b)nh th) c:in di0u h4 tlr0ul ,/l 'IltuiJNti D,]t tt(-rc t).i (L/tlN(] _ : BtrN t tN ut,x: t)ii l'rIl xic xu^r'TrrdNC r(ii T ltiti Ittirtt: 120 llhit eAU !; Cho I hop t)i t'u)g d(i cai 6 yien (li), 5 vi€n x.nh\,. 4 vieu trdng. ttLir nlliiu nl)i0o, lin ltftjt, klroDg h,)arn l i cho din khidlrdc viCn di) tl)i dinrg loi. t liy li!rlr x:;r sui't di: A/',Itli viarr ):rnlr lir I vi0ll tfilllgd;i (lodcrritr:r. B/ Kh6ng cr'i vien xlnh nio dri!.,c ftr r:r. CAI] 2: Al- Ne,ldinh nrhi^ vir cri0 ti|h ll/- (lho biit ngdlr nhiin X c6 lr f0na,, x 4 {0.n) '")=1 'I.rt,, nc',' l? ,liy am ii! \'lrig yh phi(jrr-q sri !l]-tJj., Cli,r !crlir neil| llriir (X,Y) (, iJ=Ix,L')c ll: li: rl'l fli\ ilrr, lri.:i, |]iiri,n{ s;ti vi'i lr': Cr\Lt .!: k! v{)ng var phfi,Dg sai. d4:ilrr ltil \li.t rrirr ri',rr:' crl thd dcnr (arn tl drnrc diy tl)a;ns lie sru (/nrr rr)'?S td,)r/. i Nr \ ;i I s,, . ''J.r,?* ,'"i i.Gr,iii t. x c (l).rI) ciir biiJrr nltiitr rrhien Y - )i' lrhin phiri diu trCrr rip: : r1,x 2 {),y > l) l \'. |lr,t:.:,r':r'r, ir\'cer, rrr:irr r ;. r rj \ r I l;l ,,'- t5()() ,rgl,ial,r- l)l]l llii kiirrr tlirrlr r.ir tlrLrvii ti li1,b,-i1,1'i"r,i2nlrirlril [,-1,, , VLii rrrrit ! j rrlrli rrllirrr. Ll':}t!!i'tt" t't,1tr lirrj tlnin t,lt,;i i,t(t),1) 1l'i l'\1ttl -'.5It)'=0.r9. r,t ( It:t,r1t: tt)t1lr l ltln)n I liuu I tit ,,t t # t l)t,"nrr x^c xtJA I '[rdNC I(t 7lk'ti lidttS: I2l) Itfit CALI I : Milt lxlp tlr!raic i', i' uirtir ii) br() iir(ia;L ii;i, 2 biio iii'rr. I rril'.: klri 'ltrrr b:.r r);rr,r: 'l'ri l,iI$1.,. rl I I' r,, rlcr rcrltLli rti:ry rreiirr nltrcirr. r!,i alo; ,\: jir saib:r(,!l]ui;f rdr n l'ti rr'r)ng hOD. ViCt biidt phnn phdi xric strit r. riit X l,! LI0l hgtnJi ilir rrur I bro.'f1nlr rric sl|ait dd nSria,i niry,nu.r cti!,c bao thui)c rdt. c! Mil ngLiiJi din Drul fief lhco, rrrir 2 blo. TiDh xdL slrit dt atth {3 InLrir (lLltJc 2 bi() lhur_ic ld1, bioll nsLri,i nrurl lrtl(tc nruA ahidc ba{) thuaic li;t. |-\-uJ. Cl:r: l:rL, r :rgi', r.!.iil X cir hall plrl]n phaii i0 x<-2 tl l:lx)- :.r<7 tL,r li x>2 a/-'nBr I'( l< x < l) ir/ - Tirrjr DX. CAU 3: (lrn ItriU r)lriar. f f X, \, )l-J ;l X. cdc dili clta o' - cAU 4: lnco drt (l cLl cil(' ( llil I l('ilr f;lv I I nilnl Chi6u cao (crn) 150 - 200 200 -250 Sd ciiy 5 20 50 n/- ohitug cii)'ca' chi6u clo< 251)orn goi lir c6y chiin) Ll :rrn ,' r \,ir J(' ri|l . ij) 1'<' . Lr/ Nriiriirg chiiu crro lrrng l.irrh riir lo:ri ciry trerr Ii kidrrl tm (r=0,{)-5 N(a, o1),r dai biir. Tln $dc iri\ing hop li tudi) c(i kd{ qu:i sau: 250 -300 300 - 350 350 - 400 45 24 ldn. Uac l!lc,n8 ti lG oiy 27{)crn d!t(tc klrrirrg. )\,1rlc //- [...]... vd , kidmra uonglldng c6 ghi trCnbaobj crlr I s6 16hino donggdi sirt t:i r!:ii'.: si6uthi vi c6 bdng qui sau: kdt I nol Cl1eot kidm tra Sd 16harg dudc Th4ngl/2002 79 Thdns612402 sd lo hang canfiidu bi 93 44 a) Hay sosenh le c:ic16hlng bi canthidud 2 thdididmvdi mfc i nghia(r = 0.05 d '/6i b) IJdcldongti IQ bj cin thidu d thdi didm thdng6/2002 dd rin cay 997, v:i d6 cnlnn tuYo canXlemlra ir nnar xac... th6plim ra c6 bing thdng sau: ( Gie thidt dObdn X kc cia th6pruantheoluet chudn (kc/mm')) X 56 sf nr 15 23 30 25 '1 a) Chokdt luanve hi€uqudvi6c cdi tidncrch luyen$6p vdi mfc i nghia.t = 0,01 b) tJuciudngd6 b€n trungbinhcfiatl6p saucai ddn vdi d6 tin cay 957" D i d i n C f u l: 3 d ; C a u 2t z d , C u 3 | 2 , 5 d; C e u 4 : 2 , 5 d Thi sinhth6ng mangtei leu vio phdng , thi DE12,.,,, Q!14!:H6p ! chda8... ra nim nay c6 chieu hu6nggiem sft dUng th6ng ? kidm ra vdi mrlc kidm dinh q.= 0.05 2) Udc iirorg sd sdnphdmtung binhbdnm hing ngiy ,vdi dOrin cey 957a.(giithidl sd lieu rhdng ftan rheoluarchudn) kc Didrn nu i3d ; C u2:2d, Ce,n3:2.d;Cau4:3d C 1 I Thisinh k}6ngmang iiCuveophdng tai rhi ,;:, (10 DB 70.t'o' ,oot 't d6 2 Q!y-! : C62 hqpbi , hOp - chfa5i./+ bi trong c6 2i bj dd , ( i = 1,2) Ldv ngiu nlueomol... r,g: l)0 1i!tLi| C,:\! L, {,j 2 bi'rhrl]|]air 1.\'rnaiil)inl)daLr liiy rlrh li) lo ihUix riit,5 lLrxiiLr ngiLrrrhirn (li ril hlrthI) lliy rrgiu nhiCllI lo ch vio bl/rhA I ltr til irlnhn clrovio blnlt':]sllrr tr'trh rin kh6ng a,/ irrhrric rrrft ili ,,ril,r tlruric I Lrolllr A thiy ddi ii 16tiit \ii!r l V C o i X l l i s i ; | , r l r L r ar! a ;tri ( , n !irr ' i l l lA l i I b r i f g t ) l r ; i l... (gii thiCtring chi6udai cactrucmdy ld i bidnngdunhi6nc6 pnAn ph6i chudn) 1) HAy so s6nirchi6u dai rrungbinhcria cdc truc mdy ldur ra r,6i chidu dii qui J r n ht d i n r 1r l r e h j a , i = 0 t , 5 2), Hey d1c ldgng chidu ddi trung binl ciia,cecftuc mdy vdi d6 rin ciy 95olo Ndir yeu c)u rtdc luong chidu dii tluc miy vrJi . tuydn tinh giiia ni;g su{t lrta vdi ludng phan b6n, (Gie thiei Y c6 pMn phdi chua'd) 6hi chrl : B{ng tra cdn thidt cho phla sau dd rhi. Ngay 29 thdng 05 ndm 2004 BO MdN. TOAN _____r._____ Ghi chri: c:in b6 ,)oi rhi khdng giii thich dd thr. Dt THr MON: xLc suAr rH6NG Ko Ma mon hoc: 1001020 Dd thi gdm I trang Thdi gian 60 phft Khong duo,,c srr dUng. viec h{t tIu6c 16 cd fie kh6rg? Cho k6t luan d sF5%. Ghi chd : Btrng tra can thiei cho phia sau dd thi. m 2005 G-, -7 I)1 Tim ktoing dn cAy vien. tr1lng btnb htd.lg thdi Sian Ngey