Download - XSTK Nhom 5 - Ngo Hoang Thuan
I HC HU
I HC QUC GIA TP.HCMTRNG I HC BCH KHOA
-----(((((-----
BO CO BI TP LN
XAC SUT THNG KGVHD:TS. Nguyn Ba Thi
SVTH :Ng Hong Thun
MSSV:41203699
Nhom :A09-B
tai :5
TP.HCM, THNG 4 NM 2014
CU 1:
Bang sau ay cho ta phan bo thu nhap cua hai nhom tuoi: Nhom t 40 50 tuoi va nhom t 50 60 tuoi trong tat ca cac cong nhan vien chc cua Thuy ien nam 1930 (n v: 1000 curon)
Nhom tuoi
Thu nhap
0 11 22 33 44 6 6
40 507831267403557220009115276919
50 60 785820685241861228067764222
Co s khac nhau ve ty le thu nhap gia hai nhom tuoi nay khong? Mc y ngha = 1%.BI LMDng bi: SO SNH T S N GINGi thit: Ho: ty le thu nhap gia hai nhom tuoi ny ging nhau.Cch gii quyt: S dng hm CHITEST ca MS-Excel tnh P v so snh vi , c th:
P>: chp nhn gi thit Ho P: bc b gi thit HoQuy trnh gii trn Excel:
1) Nhp d liu vo bng tnh:
Tnh cc tng s:
Tng hng: chn H3 ri nhp =SUM(B3:G3), gi con tr ko k t t H3 xung n H4.
Tng ct: chn B5 ri nhp =SUM(B3:B4), gi con tr ko k t t B5 sang n G5.Tng cng: chn H7 ri nhp =SUM(B3:G4) Tnh tng cc tn s l thuyt:
Chn B16 ri nhp =$H3*B$5/$H$7, v ko cho tt c cc trong bng cho cc nhm tui 40 50; 50 60Ta c bng:
2) Tnh gi tr P:
Chn G15 v s dng hm =CHITEST(B3:G4;B12:G13)Bin lun: bc b HoKt lun: Vy ty le thu nhap gia hai nhom tuoi ny khc nhau.CU 2:
So kilomet i c nh 1 lt xang cua 4 loai xe oto A, B, C, D c ghi lai nh sau tren
cac xe chay th nghiem:
Loai A: 25, 23, 20, 27, 20 Loai B: 28, 31, 27, 28, 26
Loai C: 32, 33, 30, 28, 32 Loai D: 24, 24, 23, 27, 22
Vi mc y ngha = 5%, hay so sanh mc tieu thu xang trung bnh cua 4 loai xe noi tren.
BI LMDng bi: PHN TCH PHNG SAI MT NHN T.Gi thit : H0: mc tieu thu xang trung bnh bng nhau cua 4 loai xe.Cch gii quyt: p dng Anova: Single Factor ca MS-Excel tnh F v so snh vi F ,c th:
F Fcrit = 3,238872 ( bc b gi thit H0Kt lun: Vy mc tieu thu xang trung bnh cua 4 loai xe l khc nhauCU 3: Tnh ty so tng quan cua Y oi vi X ,he so tng quan va he so xac nh cua tap so lieu sau ay. Vi mc y ngha = 5%, co ket luan g ve moi tng quan gia X va Y (Co phi tuyen khong ? Co tuyen tnh khong ?).Tm ng hoi quy cua Y oi vi X.
X0,91,221,320,771,31,20,91,221,320,771,31,2
Y-0,30,10,7-0,28-0,250,020,30,50,4-0,2-0,30,08
BI LM
Dng bi: PHN TCH TNG QUAN V HI QUY.
Cch gii quyt: p dng Anova: Single Factor tinh SSF v SST t tnh c t s tng quan suy ra Fqs va so sanh vi c.
p dng Correlation tnh h s tng quan, h s xc nh, gi tr Tqs v so snh vi ngng c
p dng Liner Regression phn tch hi quy.
Quy trnh gii trn Excel:
1) Nhp gi tr vo bng tnh:
2) Tnh h s tng quan, h s xc nh ca Y i vi X, kt lun v mi tng quan tuyn tnh gia X v Y
Vo Data /Data analysis , chn Correlation:
Trong hp thoi Correlation ln lt n nh: Phm vi u vo: Input Range, qut vng ($A$1:$B$13). Cch nhm theo hang hay ct: Group By, chn Columns (nhm theo ct). Chn Labels in first row (nhn d liu hng u).Phm vi u ra: Output Range, chn D1
Nhn OK, ta s c bng kt qu sau:
Ta tm c h s tng quan r = 0.432996V h s xc nh r2 = 0,187485536Gi thit: Ho : X v Y khng c tng quan tuyn tnh.
Gi tr quan st: Tqs = 1,519036936M:
c = 2,228.
(c l phn v mc /2=0.025 ca phn b Student vi n-2=10 bc t do).Bin lun: V lTl < c nn ta chp nhn gi thit Ho.Kt lun: X v Y khng c tng quan tuyn tnh.3) Tnh t s tng quan ca Y i vi X, kt lun v mi tng quan phi tuyn gia X v Y:
Chuyn X, Y v dng bng:
Vo Data chn Data Analysis ri chn hp thoi Anova: Single Factor.
Trong hp thoi Anova: Single Factor ln lt n nh: Phm vi u vo: Input Range, qut vng ($B$1:$G$3). Cch nhm theo hng hay ct: Group By, chn Columns (nhm theo ct). Chn Labels in first row (nhn d liu nm hng u). Mc ngha : Alpha (n nh =0,05). Phm vi u ra: Output Range, chn A6Nhn OK, ta c bng sau:
SSF = 1,007042SST = 1,318292
Tnh:
2Y/X = SSF/SST = 0,76 => T s tng quan:Y/X =0,87 Gi thit Ho: X v Y khng c tng quan phi tuyn.
Ta c: F = 1,056930964 vi
M:
c = 4,46 k = 4(c l phn v mc =0,05 ca phn b Fisher bc t do (k-2,n-k)=(2,8)).
Bin lun: V F < c nn chp nhn gi thit Ho.Kt lun: X v Y khng c tng quan phi tuyn4) Tm ng hi quy ca Y i vi X
Vo Data chn Data Analysis ri chn hp thoi Regression
Tip tc, nhp cc thng s sau:
Phm vi u vo (Input Range).
Nhn d liu (Label)
tin cy (Alpha)
Phm vi u ra (Output Range).
Nhn OK ta c bng sau:
Ta xc nh c b = -0,71, a = 0,69Kt lun: Vy phng trnh hi quy ca Y vi X l: y = -0,71 + 0,69x
CU 4:
Hay phan tch tnh hnh kinh doanh cua mot so nganh nghe 4 quan noi thanh
tren c s so lieu ve doanh thu cua mot so ca hang vi 3 lan quan sat nh sau (mc
y ngha 10%):Nganh nghe kinh doanhKhu vc kinh doanh
Q1Q2Q3Q4
ien lanh
Vat lieu xay dng
Dch vu tin hoc5.7:6.1:6.6
5.0:5.2:5.4
3.8:4.1:3.9
3.1:3.3:3.0
15.0:14.4:15.6
1.8:2.0:1.9
4.2:4.6: 4.4
9.5:8.8:9.8
1.3:1,5:1.4
5.0:5.2:5.5
17.5:17.2:18
4.8:4.6:4.9
EMBED Equation.DSMT4
14
_1458896729.unknown
_1458897988.unknown
_1458901289.unknown
_1458896730.unknown
_1458896728.unknown
_1436722624.unknown