N TP Chng 1 CC PHNG PHP TRNH BY S LIU THNG K 1) Th no l thng k? 2) Hy gii thch ngn gn ti sao ni: Thng k hc l mt mn khoa hc x hi, n nghin cu mt lng trong s lin h cht ch vi mt cht ca cc hin tng kinh t - x hi s ln trong iu kin thi gian v a im c th. 3) So snh s ging v khc nhau gia quy lut s ln v tnh quy lut thng k. 4) Th no l tng th thng k? n v tng th thng k? 5) Phn bit tiu thc s lng v tiu thc thuc tnh, mi loi cho 3 v d. 6) Th no l ch tiu thng k? C nhng loi ch tiu thng k no? 7) So snh s ging v khc nhau gia tiu thc v ch tiu. 8) Cc ch tiu sau ch tiu no l ch tiu khi lng:a. nng sut lao ng bnh qun mt cng nhn

b. S lao ng bnh qun trong k ca doanh nghipc. Gi bn mt n v sn phm.

9) Trong cc ch tiu sau, ch tiu no l ch tiu cht lng: a. S lao ng bnh qun trong k ca doanh nghipb. S lng sn phm sn xut ra trong doanh nghip

c. Tng s nguyn liu tiu hao cho sn xut doanh nghip d. Nng sut lao ng bnh qun mt cng nhn 10) T i tng nghin cu ca thng k hc, hy gii thch ti sao qu trnh nghin cu thng k (TK) gm ba giai on: iu tra TK, tng hp TK v phn tch TK. 11) Nu cc phng php c bn c s dng trong qu trnh nghin cu thng k. 12) Trnh by phn loi iu tra thng k. 13) Khi iu tra thng k, phi m bo nhng yu cu g? Ti sao? 14) Hy lp phiu iu tra thch hp cho mt cuc iu tra ly kin khch hng v mc hi lng mt loi dch v (sn phm) no (sn phm, dch v anh ch t chn). 15) Hy xut nhng bin php khc phc sai s trong iu tra thng k. 16) C my phng php trnh by s liu thng k? Hy trnh by cch thc trnh by s liu thng k bng bng thng k?

17) Cho v d v cc mu bng thng k n gin, phn t v kt hp. Tng ng vi s liu ca mi bng v cc th nu bt c trng ca hin tng vi thm m theo bn l cao nht. 18) Trnh by cc nguyn tc c bn ca phn tch thng k. 19) Nu tn cc phng php phn tch thng k bn bit. * Hy chn cu ng nht trong cc cu tr li cho cc cu hi sau: 20) Cn c vo phm vi iu tra, iu tra thng k c chia ra:a. Thng xuyn v khng thng xuyn

b. Ton b v khng ton b c. Chuyn mn v bo co thng k nh k d. C a, b, c u ng 21) Tng iu tra dn s l loi iu tra: a. Ton bb. Thng xuyn c. Khng thng xuyn

d. a v c ng 22) phn t thng k mt cch hp l, ta da trn nhng c s no? 23) Trnh by cc bc phn t thng k. 24) Hy chn cu tr li ng nht: Khi phn t thng k theo tiu thc s lng, ta cn c vo: a. Mc ch nghin cub. S lng cc tr s lng bin theo tiu thc nghin cu

c. C a, b ng d. C a, b sai 25) C ti liu sau cu cc cng nhn ti mt nh my trong thng 1/2008 nh sau: T S CN S T S CN S lng lng SP SP kg (ngi) kg 2 A 1 2 2405 11 25 2125 1866 12 14 1134 1448 13 18 1494 936 14 22 1980

A 1 2 3 4

(ngi) 1 26 20 16 12

2

5 6 7 8 9 10 Yu cu:

17 14 15 10 20 9

1530 1261 1365 845 1884 675

15 16 17 18 19 20

8 15 6 7 15 10

728

1382 488 527 1365 920

1/ Cn c vo nng sut lao ng bnh qun mt cng nhn, hy phn t s cng nhn trn thnh 4 nhm c khong cch t u. Trong mi nhm hy tnh s cng nhn v s lng sn phm. 2/ Cn c theo tiu thc s cng nhn, hy phn t 20 t lao ng trn thnh 4 nhm c khong cch t u. Trong mi nhm hy tnh s t lao ng, s sn phm sn xut c. 26) C s liu v mc thu nhp v s cn b cng nhn vin ca cc bu cc trong mt tnh trong nm 2004 nh sau: S TT 1 2 3 4 5 6 7 8 9 10 Thu nhp bq thng S L (1000 /ngi) 2.000 2.125 2.025 2.200 2.118 2.230 2.300 2.225 2.325 2.564 (ngi) 5 7 8 6 9 10 11 13 15 14 S TT 11 12 13 14 15 16 17 18 19 20 Thu nhp bq thng (1000 /ngi) 2.430 2.500 2.480 2.520 2.600 2.400 2.550 2.580 2.620 2.420 S L (ngi) 14 13 15 16 17 18 17 19 20 18

3

Yu cu: 1/ Cn c vo thu nhp bnh qun mt cng nhn, hy phn t cc bu cc trn thnh 3 t c khong cch t u (vi n v tnh tin l 1.000), trong mi t hy tnh s bu cc, s lao ng v tng thu nhp. 2/ Tng t nh trn nhng phn thnh 4 t.

Chng 2 - CC MC CA HIN TNG THNG K 1) Th no l s tuyt i? C nhng loi s tuyt i no? n v o ca s tuyt i l g? 2) Th no l s tng i? C nhng loi s tng i no? n v o ca s tng i l g? 3) Th no l s bnh qun? C nhng loi s bnh qun no? 4) Cho ba v d v s tuyt i, tng i v bnh qun. 5) Nu ngha ca tng loi ch tiu trn. 6) Nu ngha ca cc bin thin. * Hy chn cu tr li ng nht cho cc cu hi sau: 7) S tng i trong thng k c dng : a. Biu hin kt cu ca tng th b. Biu hin nhim v k hoch v kim tra tnh thc hin k hochc. Biu hin s bin ng ca hin tng qua thi gian, khng gian

d. Biu hin nhim v k hoch v kim tra tnh thc hin k hoch e. Biu hin mi nhn qu gia cc hin tng f. C a, b, c u ng g. C a, b, c, d u ng h. C a, b, d, e u ng 8) i vi s tuyt i thi im ca mt ch tiu thng k, ta c th: a. Cng dn theo khng gian nu cng thi im b. Cng dn theo thi gian c. C a, b sai d. C a, b ng 9) Tt c cc ch tiu sau u l ch tiu o lng bin thin, ngoi tr:a. Phng sai

b. S bnh qun c. Khong bin thin d. lch tuyt i bnh qun 10) Pht biu no trong s cc pht biu sau v lch chun ng:a. C cng n v tnh vi s liu dng tnh lc chun ca tiu thc s

lng.b. Lun lun ln hn lch tuyt i bnh qun c. L cn bc hai ca phng sai.

d. a v c ng 11) Theo bo co s liu thng k v tnh hnh sn xut ca cc ngnh tiu th cng nghip (TTCN), nng nghip (NN) v dch v (DV) mt a phng nh sau: - T trng gi tr sn xut ngnh TTCN chim 20%, ngnh NN - 50% trong nm 2006. D kin nhim v k hoch v gi tr sn xut nm 2007 so vi nm 2006 ca ngnh NN s tng 5% v ngnh DV tng 25%. Tnh chung cho c 3 ngnh tc tng nhim v k hoch v gi tr sn xut l 10%. Hy d bo s dch chuyn c cu ngnh ngh trong nm 2007 so vi nm 2006. 12) a. Mt cng ty mua 300 tn go c t l tm l 12%. xut khu phi loi bt tm cn t l l 8%. Nh vy trng lng go cn li xut khu l bao nhiu? b. Mt cng ty mua 180 tn la c t l tp cht l 15%. Hy tnh trng lng la tiu chun qui i tng ng nu vi t l tp cht l 10%. Nu gi mua 1 kg la tiu chun l 1.500 th gi mua 1kg la trn l bao nhiu? 13) Cho bit tc tng doanh thu ca mt Bu in nm 2005 so vi nm 2004 l 25%. Trong doanh thu vin thng tng 30%, doanh thu bu chnh tng 8%. Hy xc nh t trng ca doanh thu Bu chnh, Vin thng trong tng nm 2004 v 2005. 14) C ti liu v doanh thu ca cc bu cc trc thuc Bu in tnh X trong nm 2004 v 2005 nh sau: Tn Bu cc A 2004 Thc t 10,2 Doanh thu (t ng) 2005 K hoch Thc t 13,2 13,0

B C D E Hy tnh:

12,3 17,8 15,0 20,0

14,5 20,0 19,0 25,0

15,0 19,0 20,0 26,5

S tng i nhim v k hoch ca mi Bu cc v ca c Bu in tnh. S tng i hon thnh k hoch ca mi Bu cc v ca ton Bu in tnh. S tng i ng thi ca mi Bu cc v ton Bu in tnh. Tnh doanh thu bnh qun mi bu cc trong nm 2004 v 2005 Trnh by cc kt qu tnh ton trn trong bng thng k. Tnh lch tuyt i bnh qun theo doanh thu ca cc bu cc trong nm 2004 v 2005 Tnh phng sai theo doanh thu ca cc bu cc trong nm 2004 v 2005.15) C s liu v doanh thu ca mt Bu in tnh trong nm 2002 - 2003 nh sau:

Nghip v Ton b: Trong : -Bu chnh

Doanh thu (t ng) 2002 2003 98 108 9 ?

Tc pht trin 2003/2002 (%) ? 120 ?

-Vin thng ? ? Hy in nhng s liu cn trng trong bng trn?

16) C tnh hnh hon thnh k hoch v doanh thu cc ca 4 bu cc trong mt bu in huyn X trong nm 2005 nh sau 6 thng u nm K hoch (t ng) % hon thnh KH 3,6 101,3 3,4 98,5 1,4 97,4 2,4 90,0 6 thng cui nm Thc hin (t % hon thnh ng) KH 4,8 98,0 4,2 102,3 2,0 103,1 3,2 100,0

Bu cc A B C D

Hy xc nh % hon thnh k hoch bnh qun v doanh thu ca bu in huyn X. 1. Trong su thng u nm. 2. Trong su thng cui nm.3. Trong c nm 2005.

16)

a. Mt nhm 3 cng nhn cng chuyn cc bc in chuyn tin trongkhong thi gian nh nhau. Ngi th nht chuyn mt bc in mt 1 pht, ngi th hai mt 50 giy t v ngi th ba mt 1 pht 20 giy. Tnh thi gian hao ph bnh qun chuyn xong mt bc in ca mt in bo vin trong c nhm trn.b. Hai t in thoi vin 108 gm: T 1 c 10 ngi, t 2 c 12 ngi cng

trc mt ca trong khong thi gian l 6 gi. Trong t1, bnh qun mi in thoi vin tr li mt cuc gi ca khch hng mt 2 pht, mi in thoi vin t 2 tr li mt cuc gi ca khch hng mt 1 pht 20 giy. Tnh thi gian bnh qun mt in thoi vin tr li mt cuc gi ca khch hng ca 1 in thoi vin trong 2 t trn. 17) Mt xe ch th khi hnh t bu in A i bu in B vi vn tc trung bnh l 50km/h v lt v vi vn tc 40km/h. on ng i t bu in A n bu in B l 100km.Yu cu: Tnh vn tc bnh qun ca on xe trn trong hai lt i v v. Tnh vn tc bnh qun ca on xe trn nu khng c ti liu v di qung ng. 18) Thu thp ti liu t 100 x nghip ca cng mt ngnh sn xut v tin hnh phn t, ta c bng sau: Gi thnh 1kg Nng sut lao ng bnh qun mt cng nhn (kg) Cng SP (1000 ) 40 50 50-60 60-70 70-80 80-90 30-32 2 2 4 28-30 6 8 10 6 30 26-28 6 20 12 2 40 24-26 10 4 6 20 22-24 2 4 6 Cng 8 16 40 24 12 100 Gi s tt c cc x nghip ny u c cng mt gi tr sn lng 1) Hy tnh gi thnh bnh qun cho 1kg sn phm ca cc x nghip.

2) Hy tnh nng sut lao ng bnh qun mt cng nhn ni chung. 19) Trn on ng x , ta bit s phn b cc ngi nh nh hnh v sau: km 0 10 1 15 2 25 3 38 4 44 5 28 6 20 7 30

Theo bn ta nn t bn xe cng cng u tng khong cch t tt c cc ngi nh n bn xe l ngn nht. CHNG 3 IU TRA CHN MU 1. Th no l iu tra chn mu? iu tra chn mu c nhng u nhc im g ? Phm vi s dng iu tra chn mu nh th no ? 2. Th no l iu tra chn mu ngu nhin? Hy trnh by v iu tra chn mu nhiu ln v chn mu mt ln ? 4. Th no l sai s chn mu? Phng php tnh sai s chn mu? 5. Phng php suy rng kt qu iu tra chn mu v xc nh s n v mu cn iu tra ? 6. Hy trnh by cc phng php t chc chn mu trong iu tra chn mu ngu nhin? 7. Th no l iu tra chn mu phi ngu nhin? Trong iu tra chn mu phi ngu nhin cn p ng nhng yu cu no? 8. Ti mt n v Bu in, dng phng php iu tra chn mu c lng t l Bu phm EMS vi phm ch tiu thi gian hnh trnh. Phm vi sai s chn mu l 0,08 v gi tr tuyt i, tin cy phi t mc 99,73%. Hy xc nh s mu cn chn nu: - Cc cuc iu tra trc cho kt qu 5% ; 7% ; 10% - Khng c ti liu v cc cuc iu tra ln trc 9. Kho st thi gian m thoi ca 100 khch hng ti mt Bu cc c kt qu nh sau: Thi gian m thoi ( pht ) 1 2 S khch hng 2 10

3 4 5 6 7 8 9 10 11 12 Cng

14 20 18 13 10 6 3 2 1 1 100

Yu cu: - Tnh sai s chn mu ngu nhin thi gian m thoi ca khch hng - Tnh sai s bnh qun chn mu v t l khch hng c thi gian m thoi t 8 pht tr ln - Suy rng kt qu iu tra vi tin cy phi t 99,73% CHNG 4 TNG QUAN V HI QUY 1) Th no l lin h hm s v lin h tng quan ? 2) Th no l tiu thc nguyn nhn v tiu thc kt qu ? Hy cho v d v mi lin h gia cc tiu thc c th, cho bit tiu thc no nguyn nhn, tiu thc no l kt qu. 3) Hy trnh by cc cng vic nghin cu hin tng bng phng php tng quan 4) Hy trnh by mi lin h tng quan tuyn tnh gia hai tiu thc s lng? 5) Hy trnh by mi lin h tng quan phi tuyn gia hai tiu thc s lng? 6) Hy trnh by mi lin h tng quan gia nhiu tiu thc? 7) C ti liu ca cc doanh nghip trong mt ngnh dch v nh sau: S TT 1 2 3 4 Doanh thu (t ng) 60 90 140 120 Qu tin lng (triu ng) 110 220 240 260 S TT 6 7 8 9 Doanh thu (t ng) 105 72 80 132 Qu tin lng (triu ng) 210 180 190 250

5 50 90 10 105 220 1. Biu hin ti liu trn bng th tuyn tnh v nh gi nh tnh mi lin h.

2. Xc nh phng trnh hi qui tuyn tnh, gii thch ngha cc tham s tnhc v tnh h s tng quan.

3. Xc nh phng trnh hi qui dng parabol v t s tng quan. 4. Xc nh phng trnh hi qui dng hypebol v t s tng quan.5. Anh (ch) chn dng hi qui no? ti sao? 8) C ti liu v sn lng v gi thnh n v sn phm A trong 6 thng u nm 2002 ti 1 doanh nghip nh sau: Thng 1.Sn lng (100 tn) 1 50 2 35 3 10 4 20 5 40 6 30

2.Gi thnh 1 tn sn phm 20 22 30 25 22 23 (1000) Hy lp phng trnh hyperbol biu hin mi lin h tng quan trn. gii thch ngha ca cc tham s tnh c.

1. Tnh t s tng quan v rt ra kt lun.2. D kin thng 7 sn xut 500 tn hng. Hy d on gi thnh 1 tn sn phm thng 7. 8) C ti liu iu tra th trng v gi bn lng tiu th qua cc thng ca mt mt hng nh sau: Gi bn (/sn phm): 1500 1700 200 1900 120 2100 70 Lng tiu th (1000SP) 250

Trn c s phng php hi qui tng quan. Hy d on lng tiu th mc gi 2000/SP. 9) C ti liu iu tra chn mu v tui ngh nghip v tin lng thng ca 30 cng nhn trong mt x nghip nh sau: S TT Tui ngh Tin lng S TT Tui ngh Tin lng (nm) (1000) (Nm) (1000) 1 10 1600 16 03 1250 2 02 1300 17 02 1280 3 20 1800 18 18 1700 4 20 1650 19 05 1490 5 05 1400 20 03 1300 6 01 1200 21 21 1750

7 8 9 10 11 12 13 14 15 Yu cu:

09 24 05 13 15 01 30 14 08

1500 1750 1380 1500 1700 1220 1500 1600 1500

22 23 24 25 26 27 28 29 30

02 06 08 08 02 05 06 10 07

1300 1750 1300 1380 1500 1380 1400 1600 1550

1. Hy xc nh dng hm tng quan tuyn tnh ca hai tiu thc trn.Hy cn c vo ti liu phn t 30 cng nhn trn thnh 6 t u xc nh dng hm tng quan tuyn tnh ca hai tiu thc trn.

CHNG 5 DY S THI GIAN 1. Th no l dy s thi gian? C nhng loi dy s thi gian no? 2. phn tch dy s thi gian c nhng ch tiu no? 3. C nhng phng php no biu hin xu hng pht trin ca hin tng? 4. Th no l d bo thng k ngn hn? C nhng phng php d bo no? 5. Hy d bo doanh thu nm 2009 cn c vo kt qu thc hin cc nm ca mt n v Bu in : Nm doanh thu , t ng 1999 49,6 2000 42,7 2001 44,5 2002 45,5 2003 50,2 2004 52,4

2005 2006 2007 2008

50,8 51,3 52,1 52,8

Yu cu : Tnh lng tng tuyt i, tc pht trin, tc tng (nh gc, lin honv bnh qun)

CHNG 6 CH S TRONG THNG K 1. Th no l ch s ? Trong thng k c nhng loi ch s no? 2. Hy trnh by cch tnh ch s c th; ch s khng gian; ch s tng hp? 3. Hy trnh by h thng ch s trong thng k? Nghin cu h thng ch s lm g? Bi tp:1. a. Vi cng mt s tin mua hng vi nm 2002, nm 2003 ngi dn thnh

ph X mua thm c 20% lng hng ha so vi nm 2002. Hi gi c ti thnh ph ny tng hay gim bao nhiu % qua hai nm?b. Gi c cc mt hng ti thnh ph X trong nm 2003 so vi nm 2002

tng 5%, cn lng hng ha bn ra tng 8%. Vy tng lng hng ha tiu th ti thnh ph ny tng bao nhiu %? c. Gi c cc mt hng ti thnh ph X trong nm 2003 so vi nm 2002 gim 4%, cn lng hng ha bn ra tng 10%. Vy tng lng hng ha tiu th ti thnh ph ny tng hay gim bao nhiu %?2. C s liu v gi cc bnh qun v sn lng bu phm ti mt n v bu

in trong k gc v k bo co nh sau: Tn sn phm Bu kin trong nc Bu kin ngoi nc Bu phm CPN trong nc Bu phm CPN ngoi nc Hy tnh: Gi cc bnh qun (1000 ng) K gc K bo co 64 66 920 20 220 900 25 225 Sn lng (ci) K gc K bo co 2.250 2.500 500 60.300 2.500 600 60.500 3.000

a. Ch s c th v gi cc v lng bu phm gi

b. Ch s chung v gi cc v lng bu phm tiu dng c. Phn tch s thay i v doanh thu qua hai k do nh hng ca hai

nhn t: gi cc v sn lng tiu dng.3. Ti mt th trng, c tnh hnh bn l ca mt s mt hng qua hai k nh

sau: Mt hng A tng 3%, mt hng B gim 4%, mt hng C gi khng i, mt hng D tng 5%. Hy xc nh ch s chung v gi c, bit rng t trng tiu th hng ho k bo co ca 4 mt hng trn c cho trong bng sau: Mt hng T trng, % A 30 B 20 C 25 D 25

PHN II: THNG K HOT NG KINH DOANH DOANH NGHIP CHNG 7 THNG K KT QU HOT NG KINH DOANH CA DOANH NGHIP 1. Kt qu hot ng ca doanh nghip c biu hin nh th no? Nhim v ca cng tc thng k? 2. Ti sao khi thng k sn lng doanh thu li phi phn t thng k? Cch thc phn t? 3. Ti sao phi thng k nghin cu bin ng sn lng doanh thu? Phng php thng k nghin cu? 4. Hy trnh by cc ch tiu thng k cht lng dch v in thoi trn mng vin thng c nh mt t? 5. Hy trnh by cc ch tiu thng k cht lng dch v in thoi trn mng vin thng di ng mt t? 6. Hy trnh by cc ch tiu thng k cht lng dch v in thoi VoIP? 7. Hy trnh by cc ch tiu thng k cht lng dch v truy nhp Internet?

8) C s liu v cc sn phm i cng ca mt cng ty nh sau: Loi a 30 Gb 40 Gb Gi 1000 700 800 SLHV 200 300

-

80 GB

1100

120

Tnh sn lng hin vt quy c ca tt c cc loi a trn? Ly a 40GB lm sn phm chun. 9) C s liu sau y ca doanh nghip SX my ko nng nghip: Loai may keo - 5 ta n - 7 ta n - 12 tan He so qui oi 1 1,4 2,4 SLHV KH 15 20 15 SLHV TH 20 20 10 SLQ KH 15 28 36 SLQ TH 20 28 24

-

79

72

1. Tnh sn lng hin vt quy c ca tt c cc loi my ko trn? Ly my ko 5 tn lm sn phm chun. 2. nh gi tnh hnh hon thnh k hoch sn xut ca doanh nghip theo n v hin vt v hin vt quy c. 10) C liu v cc sn phm bu chnh vin thng nh sau: STT A 1 2 3 4 5 6 Loi sn phm b in thoi dng di BFAX My T c nh thu bao My di ng thu bao Knh in thoi cho thu DV 108 (1080, 1088) Cc BQ SL hin vt 1.000 c (1) (2) cuc 1, 2 20 000 trang 3 3 000 my/thng 27 10 000 My/thng 120 2 000 knh/thng 1 500 20 pht 1, 4 5 000 VT

Hy tnh tng sn lng cc sn phm vin thng trn nu: 1. Ly sn phm in thoi ng di lm sn phm chun

2. Ly sn phm BFAX lm sn phm chun. 3. Cho nhn xt v s liu quy i trong trng hp ny

11) C s liu v sn lng ti mt giao dch trong nm 2003 nh sau: STT nh mc Thi gian (giy) 1. Nhn gi Fax Bc 660 2. Pht Fax Bc 420 3. in bo ni tnh Bc 484 4. in bo lin tnh bc 484 5. in bo ngoi nc bc 848 6. Thu cc ph thu bao trn my T h.n 88 tnh 7. Thu cc ph thu bao nhn cng T h.n 178 8. in thoi ni ht Cuc 138 9. in thoi ng di ni tnh Cc 138 10 in thoi ng di lin tnh Cuc 138 . 11 in thoi i quc t Cuc 138 . 12 Collect call Cuc 138 . 13 Dch v 108 Cuc 138 . 14 Nhn yu cu v thu tin lp t 2.760 . Loi sn phm VT Sn lng 5.400 2.300 2.200 10.800 12 2.500 1.000 96.000 310.000 770.000 400 70 4.000 11.000

Hy tnh tng sn lng qui i cc sn phm trn nu: 1. Chn nhn in thoi ni ht lm chun. 2. Chn nhn gi Fax lm chun. 12) C s liu v my in thoi di ng thu bao tr sau ti mt cng in thoi X trong thng 4/2007 nh sau: n v tnh: my/thng Thi im S my 1.4 1 000 5.4 1 025 20.4 1 045 25.4 1 200

Hy tnh sn lng my thu bao bnh qun trong thng?13.C s liu thng k v s lng my in thoi thu bao ca cng ty in thoi Y nh sau: s c 01/01/2003 l 50.000 my; s bin ng cc thng trong nm c trong bng sau: Thng 1 2 3 4 5 6 7 8 9 10 11 12 S my pht trin mi S my t chi s dng 55 15 50 48 45 40 37 48 55 57 70 75 80 12 11 10 5 6 5 13 17 20 23 25

1. 2.

Tnh tng sn lng nm 2003 ca cng ty Y; Tnh doanh thu thu c t cc thu bao in thoi, bit cc thu bao cho mt my / thng l 27.000 ng?

2.4. Thng k cht lng sn phm Dng BT: 1. - Tnh quy m mu * kim tra ly kin ca khch hng v s hi lng cht lng loi SP X, ngi ta hi kin ca 100 khch hng v thy c 70% s khch hng tr li l hi lng. Hi vi kt qu ny iu tra 100 khch hng c hay cha hay phi iu tra nhiu hn nu sai s t l cho php l 5% 2. - Kim nh t l m ng *Theo bo co ca mt nh my sn xut sn xut m reo th t l nhng chic m reo ng cht lng l 95%. Ngi ta kim tra 60 ci th thy ch c 56 ci reo. Hy cho nhn xt v bo co ny vi mc ngha = 1%. 3. - Kim nh khi bnh phng * Mt nh sn xut xe gn my va mi trin khai mt loi xe i mi (i Y) vi 4 loi mu en, , bc, kem. T mc bn cc loi xe i trc (i X) vi s lng phn phi nh sau: Mu en bc kem T trng tiu th, % 18 17 35 30 Nh sn xut mun bit t l ny c thay i vi loi xe i Y hay khng sn xut xe ra vi s lng thch hp. Nh sn xut quyt nh thc hin kim nghim th trng xc nh t l mua cc loi mu khc nhau vi loi xe i mi ny.

Sau mt kim nghim th trng 1 thng, cc s liu thu thp c cho thy 1500 xe i mi c bn ht v s phn phi v s lng bn ra nh sau: bc kem T trng tiu th, % 16 19 33 32 Nh sn xut t cu hi: Cc s liu t kim nghim th trng c ch ra c s thay i no trong mu tiu th xe i mi hay khng?CHNG 8 THNG K LAO NG TIN LNG DOANH NGHIP 1. Hy trnh by cch thc thng k s lng v kt cu lao ng? 2. Hy trnh by cch thc thng k nghin cu bin ng v tnh hnh s dng lao ng? 3. Trnh by thng k nghin cu s dng thi gian lao ng theo ngy cng? 4. Trnh by thng k nghin cu s dng thi gian lao ng theo gi cng? 5. Trnh by thng k nghin cu ch tiu nng sut lao ng? 6. Bi tp kim tra k hoch v lao ng

Mu

en

C s liu v sn lng trong k k hoch v thc hin ca mt doanh nghip trong nh sau: Loi SP A B C D nh mc gian, pht 30 8 12 15 thi S lng hoch, 103 sn phm 160 220 230 160 k S lng k thc hin, 103 sn phm 175 230 215 150

S lao ng theo k hoch trong k ca doanh nghip l 100 ngi, s lao ng thc t l 110 ngi. Hy kim tra tnh hnh thc hin k hoch v lao ng ca doanh nghip ny 3.4. Thng k NSL - Phn tch tnh hnh bin ng nng sut lao ng bnh qun C s liu v gi tr sn xut v s cng nhn ca hai nhm sn xut hai sn phm A v B trong hai k gc v bo co nh sau:

Nhm cng nhn

A B

Gi tr sn xut, triu ng K gc K bo co 1 2 26.000 35.200 1.200 1.050

S cng nhn, ngi K gc K bo co 3 4 200 220 20 15

Phn tch s bin ng nng sut lao ng bnh qun ca hai nhm cng nhn trn. Tm cc nguyn nhn nh hng n nng sut lao ng bnh qun

CHNG 9 THNG K TI SN DOANH NGHIP 1. Hy trnh by cch thc thng k s lng v kt cu ti sn c nh? 2. Hy trnh by cch thc thng k nghin cu bin ng v hin trng TSC? 3. Trnh by thng k nghin cu tnh hnh s dng v hiu qu s dng ti sn c nh ? 4. Trnh by thng k nghin cu tnh hnh cung cp, d tr m bo vt t cho hot ng kinh doanh? 5. Trnh by thng k nghin cu tnh hnh s dng vt t; tnh hnh thc hin nh mc tiu hao vt t cho mt n v sn phm dch v? 6. Nm 2001, mt x nghip mua mt tng i ni b gi 40.000.000 v 10 bn khaithc vi gi 12 triu ng/ci. Nm 2003 mua thm 8 bn khai thc cng loi vi gi 10 triu ng /ci. Vo u nm 2008 tin hnh nh gi li s thit b trn vi gi khi phc ca bn khai thc l 10 triu ng/ ci v tng i ni b trn l 32 triu ng. Yu cu: nh gi li s ti sn c nh trn theo cc hnh thc m cc anh chi bit, nu nh mc t l khu hao cho mi ti sn c nh trn l 10%/nm. 7. Bi tp tnh khu hao TSC