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Phần I: CÁC BÀI TẬP CHƯƠNG 3 VÀ 4
Bài 1:
  Nhân tố A                 Lần Lặp n                                     ∑    hàng
                      1           2                           3
       a1             1           4                           9                  14
       a2             4           9                          16                  29
       a3             9          16                          23                  48
      ∑    cột       14         29                          48                  91




Nhân tố          F
                                      ∑(X            )   2
                                                −X                S2
                                            i

A                 k-1=2               SS A = SS 2 − SS 3                   SS A
                                                                  SA =
                                                                   2

                                                                          k −1
Tno               K(n-1)=6            SS TN = SS1 − SS 3                      SS TN
                                                                    2
                                                                  S TN   =
                                                                            k (n − 1)




                                 1
n
Ai = ∑ y ij ; A1 =14 ; A2 =29 ; A3 =48
      j =1


SS 2 =
          1 k 2 1 2
                           (
            ∑ Ai = 3 14 + 28 2 + 48 2 = 1113.67
          n i =1
                                                )
                       (                                                                 )
             k   n
SS1 = ∑∑ y ij = 12 + 4 2 + 4 2 + 9 2 + 9 2 + 9 2 + 16 2 + 16 2 + 23 2 = 1846
           2

          i =1 j =1
                                   2
            1  k          1
SS 3 =             ∑ Ai  = 912 = 1380.1667
       k ( n − 1)  i =1   6
Bài 2:

Nhân F
                      ∑(X               )   2
                                   −X                                                        S2
                               i
tố
A    k-1=2            SS A = SS 2 − SS 3 = (1113.67 − 1380.17) = −266.5                               SS A − 266.5
                                                                                             SA =
                                                                                              2
                                                                                                             =          = −133.25
                                                                                                     k −1          2
Tno          k(n-1    SS TN = SS1 − SS 3 = (1846 − 1380.17) = 465.83                                     SS TN      465.83
             )=6
                                                                                               2
                                                                                             S TN   =            =         = 76.14
                                                                                                       k (n − 1)      6

                    SA2
                        − 133.25
Tính F tính: Ft = 2 =            = −1.75
                   S TN   76.14
Do F tính < 1 nên không thỏa mãn điều kiện F tính >1, bài toán không kết luận được



 Nhân tố D                                              Lần Lặp n                                          ∑    hàng
                                1                    3                 2                      4
     A                          3                    6                 1                      2                   12
     B                          5                    7                 4                      6                   22
     C                          2                    3                 2                      2                    9
    ∑ cột                     10                   16                 7                     10                   43



Nhân tố                           F
                                                                  ∑(X            )   2
                                                                            −X                    S2
                                                                        i

D                                  k-1=2                          SS D = SS 2 − SS 3                       SS D
                                                                                                  SD =
                                                                                                   2

                                                                                                           k −1
Tno                                k(n-1)=9                       SS TN = SS1 − SS 3                          SS TN
                                                                                                    2
                                                                                                  S TN   =
                                                                                                            k (n − 1)

         n
Di = ∑ y ij ; D A = 12 ; DB = 22 ; DC = 9
         j =1




                                                              2
1 k 2 1 2
                                (
SS 2 = ∑ Di = 12 + 22 2 + 9 2 = 177.25
      n i =1 4
                                                    )
                            (                                                     )
        k     n
SS1 = ∑∑ y ij = 3 2 + 6 2 + 12 + 2 2 + 5 2 + 7 2 + 4 2 + 6 2 + 2 2 + 3 2 + 2 2 + 2 2 = 197
           2

        i =1 j =1
                                      2
            1  k            1
SS 3 =             ∑ Di  = 43 2 = 205.44
       k ( n − 1)  i =1     9
Nhâ F
n tố
                        (
                 ∑ Xi − X
                            2
                                          )               S2

D      k-1 SS D = SS 2 − SS 3 = (177.25 − 205.44) = −28.19 2 SS D − 28.19
       =2                                                 SD =          =           = −14.095
                                                                 k −1         2
Tno k(n- SS TN = SS1 − SS 3 = (197 − 205.44) = −8.44                SS TN      − 8.44
       1)=                                                S TN =
                                                            2
                                                                            =         = −0.94
                                                                  k (n − 1)       9
       9

                     SA2
                         − 14.095
Tính F tính : Ft = 2 =          = 14.99
                    S TN  − 0.94



Do F tính lớn hơn F bảng nên khi nhân tố D thay đổi thì có tác động đến kết quả thực
nghiệm
Bài 4:
nangsuatluami,                 matdotrong, tập 4: Trung tâm nghiên cứu lúa gạo quốc tế tai
                                             Bài
kg/ha                          no./m  2      Philippines muốn xem xét sự liên quan giữa năng suất lúa mì,
                                             y, với mật độ gieo trồng, x. Họ thực hiện các thí nghiệm và
4,862                          160           đưa ra kết quả ở bảng 11.3. Hãy đường hồi qui tuyến tính
5,244                          175           giữa x và y (quan hệ hàm giữa chúng)
5,128                                         192
5,052                                         195
5,298                                         238
5,410                                         240
5,234                                         252
5,608                                         282
Table 11.3



                                Model Summary(b)

 Mode               R               R Square Adjusted   Std. Error
 l                                           R Square     of the



                                                        3
Estimate
 1         .853(a)       .728   .682       .127396
a Predictors: (Constant), MATDO
b Dependent Variable: NANGSUAT

                               ANOVA(b)

                    Sum of                  Mean
Model               Squares     df          Square         F       Sig.
1          Regressi
                           .260    1               .260   16.036   .007(a)
           on
           Residual        .097    6               .016
           Total           .358    7
a Predictors: (Constant), MATDO
b Dependent Variable: NANGSUAT


                              Coefficients(a)

                    Unstandardized     Standardized
                     Coefficients      Coefficients
Model                         Std.                         t       Sig.
                     B        Error         Beta
1        (Consta
                       4.242   .251                       16.925     .000
         nt)
         MATD
                        .005   .001             .853       4.004     .007
         O
a Dependent Variable: NANGSUAT




                                        4
Normal P-P Plot of Regression Standardized Residual
                                           Dependent Variable: NANGSUAT
                                    1.00




                                     .75
                Expected Cum Prob




                                     .50




                                     .25



                                    0.00
                                       0.00      .25     .50       .75   1.00


                                           Observed Cum Prob




PHẦN II. PHÂN TÍCH VÀ VẼ BIỂU ĐỒ HISTOGRAM

a_aro        a_count
         6        15
        11        31
        12        35
        10        20


                                                               5
6               22
         6               26
         6               22
         5               18
        12               32
        12
         6
        14
        11
         6
         6
         6
         0
         6
         0
         6
         6
         6
         6
         6
         6
         6
         6
         5
         6
        12
        12
Sắp xếp theo thứ tự tăng dần sau đó ta tính:
      1
X =      (0 + 0 + 5 ∗ 2 + 6 ∗ 18 + 10 + 11 ∗ 2 + 12 ∗ 5 + 14 + 15 + 18 + 20 + 22 ∗ 2 + 26 + 31 + 32 + 35) = 11.125
      40
Mod = 6 ; vì n=40 (chẵn)
                     
      XN + XN 
                  +1 
Med =  2        2     = 6+6 = 6
              2            2
            ∑(X              )              [                                                                   ]
              n
       1                                 1
                                            ( − 11.125) 2 + ( − 11.125) 2 + ( 5 − 11.125) 2 +  + ( 35 − 11.125) 2 = 70.225
                                 2
S2 =                i   −X           =
       N'    i =1                        40
S f = S 2 = 70.225 = 8.38
      Sf
SX =      =      = 8.38/6.32=1.33
       n      40
     Sf
Cv =     100 = 11.9
      X




                                                                   6
Histogram
                             Dependent Variable: A_ACOUT
                       3.5

                       3.0

                       2.5

                       2.0

                       1.5

                       1.0
           Frequency




                                                                                Std. Dev = .94
                        .5
                                                                                Mean = 0.00
                       0.0                                                      N = 9.00
                              -1.50    -1.00   -.50   0.00     .50     1.00


                             Regression Standardized Residual




PHẦN III. TÌM ĐƯỜNG HỒI QUI VÀ PHÂN TÍCH ĐƯỜNG HỒI QUI ĐÓ

I – VẼ ĐƯỜNG HỒI QUI

Ta chọn cột Diameter làm biến độc lập

Chọn cột MTP làm biến phụ thuộc.

    Đường hồi quy được vẽ như sau:

                                        Variables Entered/Removedb
                                          Variables       Variables
                               Model      Entered         Removed       Method
                               1       diametera                      . Enter
                               a. All requested variables entered.
                               b. Dependent Variable: MTP


Bảng 1. Tóm tắt mô hình



                                                      7
Model Summaryb
                                                     Adjusted R      Std. Error of
                Model      R        R Square          Square         the Estimate
                1           .185a         .034                .033          18.731
                a. Predictors: (Constant), diameter
                b. Dependent Variable: MTP


Phân tích ANOVA với biến phụ thuộc là MTP

                                          ANOVAb
                            Sum of
    Model                   Squares            df          Mean Square       F        Sig.
    1       Regression       10065.626                 1     10065.626      28.691      .000a
            Residual        285578.700               814       350.834
            Total           295644.325               815
    a. Predictors: (Constant), diameter
    b. Dependent Variable: MTP


Bảng 3. thông số b và a

                                       Coefficientsa
                             Unstandardized       Standardized
                              Coefficients        Coefficients
   Model                     B        Std. Error      Beta                    t       Sig.
   1        (Constant)       68.987         2.001                            34.481      .000
            diameter           1.099         .205          .185               5.356      .000
   a. Dependent Variable: MTP


Dựa vào bảng trên ta có:
Y=1.099X1+68.987


Trong đó:
        X1: Là biến độc lập diameter




                                                 8
Residuals Statisticsa
                                                          Std.
                       Minimum Maximum        Mean      Deviation    N
     Predicted Value       73.38     97.56      79.11        3.514       816
     Residual            -60.483    31.517       .000       18.719       816
     Std. Predicted
                          -1.630     5.250       .000        1.000       816
     Value
     Std. Residual        -3.229     1.683       .000         .999       816
     a. Dependent Variable: MTP




Charts




                                       9

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Btl

  • 1. Phần I: CÁC BÀI TẬP CHƯƠNG 3 VÀ 4 Bài 1: Nhân tố A Lần Lặp n ∑ hàng 1 2 3 a1 1 4 9 14 a2 4 9 16 29 a3 9 16 23 48 ∑ cột 14 29 48 91 Nhân tố F ∑(X ) 2 −X S2 i A k-1=2 SS A = SS 2 − SS 3 SS A SA = 2 k −1 Tno K(n-1)=6 SS TN = SS1 − SS 3 SS TN 2 S TN = k (n − 1) 1
  • 2. n Ai = ∑ y ij ; A1 =14 ; A2 =29 ; A3 =48 j =1 SS 2 = 1 k 2 1 2 ( ∑ Ai = 3 14 + 28 2 + 48 2 = 1113.67 n i =1 ) ( ) k n SS1 = ∑∑ y ij = 12 + 4 2 + 4 2 + 9 2 + 9 2 + 9 2 + 16 2 + 16 2 + 23 2 = 1846 2 i =1 j =1 2 1  k  1 SS 3 =  ∑ Ai  = 912 = 1380.1667 k ( n − 1)  i =1  6 Bài 2: Nhân F ∑(X ) 2 −X S2 i tố A k-1=2 SS A = SS 2 − SS 3 = (1113.67 − 1380.17) = −266.5 SS A − 266.5 SA = 2 = = −133.25 k −1 2 Tno k(n-1 SS TN = SS1 − SS 3 = (1846 − 1380.17) = 465.83 SS TN 465.83 )=6 2 S TN = = = 76.14 k (n − 1) 6 SA2 − 133.25 Tính F tính: Ft = 2 = = −1.75 S TN 76.14 Do F tính < 1 nên không thỏa mãn điều kiện F tính >1, bài toán không kết luận được Nhân tố D Lần Lặp n ∑ hàng 1 3 2 4 A 3 6 1 2 12 B 5 7 4 6 22 C 2 3 2 2 9 ∑ cột 10 16 7 10 43 Nhân tố F ∑(X ) 2 −X S2 i D k-1=2 SS D = SS 2 − SS 3 SS D SD = 2 k −1 Tno k(n-1)=9 SS TN = SS1 − SS 3 SS TN 2 S TN = k (n − 1) n Di = ∑ y ij ; D A = 12 ; DB = 22 ; DC = 9 j =1 2
  • 3. 1 k 2 1 2 ( SS 2 = ∑ Di = 12 + 22 2 + 9 2 = 177.25 n i =1 4 ) ( ) k n SS1 = ∑∑ y ij = 3 2 + 6 2 + 12 + 2 2 + 5 2 + 7 2 + 4 2 + 6 2 + 2 2 + 3 2 + 2 2 + 2 2 = 197 2 i =1 j =1 2 1  k  1 SS 3 =  ∑ Di  = 43 2 = 205.44 k ( n − 1)  i =1  9 Nhâ F n tố ( ∑ Xi − X 2 ) S2 D k-1 SS D = SS 2 − SS 3 = (177.25 − 205.44) = −28.19 2 SS D − 28.19 =2 SD = = = −14.095 k −1 2 Tno k(n- SS TN = SS1 − SS 3 = (197 − 205.44) = −8.44 SS TN − 8.44 1)= S TN = 2 = = −0.94 k (n − 1) 9 9 SA2 − 14.095 Tính F tính : Ft = 2 = = 14.99 S TN − 0.94 Do F tính lớn hơn F bảng nên khi nhân tố D thay đổi thì có tác động đến kết quả thực nghiệm Bài 4: nangsuatluami, matdotrong, tập 4: Trung tâm nghiên cứu lúa gạo quốc tế tai Bài kg/ha no./m 2 Philippines muốn xem xét sự liên quan giữa năng suất lúa mì, y, với mật độ gieo trồng, x. Họ thực hiện các thí nghiệm và 4,862 160 đưa ra kết quả ở bảng 11.3. Hãy đường hồi qui tuyến tính 5,244 175 giữa x và y (quan hệ hàm giữa chúng) 5,128 192 5,052 195 5,298 238 5,410 240 5,234 252 5,608 282 Table 11.3 Model Summary(b) Mode R R Square Adjusted Std. Error l R Square of the 3
  • 4. Estimate 1 .853(a) .728 .682 .127396 a Predictors: (Constant), MATDO b Dependent Variable: NANGSUAT ANOVA(b) Sum of Mean Model Squares df Square F Sig. 1 Regressi .260 1 .260 16.036 .007(a) on Residual .097 6 .016 Total .358 7 a Predictors: (Constant), MATDO b Dependent Variable: NANGSUAT Coefficients(a) Unstandardized Standardized Coefficients Coefficients Model Std. t Sig. B Error Beta 1 (Consta 4.242 .251 16.925 .000 nt) MATD .005 .001 .853 4.004 .007 O a Dependent Variable: NANGSUAT 4
  • 5. Normal P-P Plot of Regression Standardized Residual Dependent Variable: NANGSUAT 1.00 .75 Expected Cum Prob .50 .25 0.00 0.00 .25 .50 .75 1.00 Observed Cum Prob PHẦN II. PHÂN TÍCH VÀ VẼ BIỂU ĐỒ HISTOGRAM a_aro a_count 6 15 11 31 12 35 10 20 5
  • 6. 6 22 6 26 6 22 5 18 12 32 12 6 14 11 6 6 6 0 6 0 6 6 6 6 6 6 6 6 5 6 12 12 Sắp xếp theo thứ tự tăng dần sau đó ta tính: 1 X = (0 + 0 + 5 ∗ 2 + 6 ∗ 18 + 10 + 11 ∗ 2 + 12 ∗ 5 + 14 + 15 + 18 + 20 + 22 ∗ 2 + 26 + 31 + 32 + 35) = 11.125 40 Mod = 6 ; vì n=40 (chẵn)   XN + XN   +1  Med =  2 2  = 6+6 = 6 2 2 ∑(X ) [ ] n 1 1 ( − 11.125) 2 + ( − 11.125) 2 + ( 5 − 11.125) 2 +  + ( 35 − 11.125) 2 = 70.225 2 S2 = i −X = N' i =1 40 S f = S 2 = 70.225 = 8.38 Sf SX = = = 8.38/6.32=1.33 n 40 Sf Cv = 100 = 11.9 X 6
  • 7. Histogram Dependent Variable: A_ACOUT 3.5 3.0 2.5 2.0 1.5 1.0 Frequency Std. Dev = .94 .5 Mean = 0.00 0.0 N = 9.00 -1.50 -1.00 -.50 0.00 .50 1.00 Regression Standardized Residual PHẦN III. TÌM ĐƯỜNG HỒI QUI VÀ PHÂN TÍCH ĐƯỜNG HỒI QUI ĐÓ I – VẼ ĐƯỜNG HỒI QUI Ta chọn cột Diameter làm biến độc lập Chọn cột MTP làm biến phụ thuộc.  Đường hồi quy được vẽ như sau: Variables Entered/Removedb Variables Variables Model Entered Removed Method 1 diametera . Enter a. All requested variables entered. b. Dependent Variable: MTP Bảng 1. Tóm tắt mô hình 7
  • 8. Model Summaryb Adjusted R Std. Error of Model R R Square Square the Estimate 1 .185a .034 .033 18.731 a. Predictors: (Constant), diameter b. Dependent Variable: MTP Phân tích ANOVA với biến phụ thuộc là MTP ANOVAb Sum of Model Squares df Mean Square F Sig. 1 Regression 10065.626 1 10065.626 28.691 .000a Residual 285578.700 814 350.834 Total 295644.325 815 a. Predictors: (Constant), diameter b. Dependent Variable: MTP Bảng 3. thông số b và a Coefficientsa Unstandardized Standardized Coefficients Coefficients Model B Std. Error Beta t Sig. 1 (Constant) 68.987 2.001 34.481 .000 diameter 1.099 .205 .185 5.356 .000 a. Dependent Variable: MTP Dựa vào bảng trên ta có: Y=1.099X1+68.987 Trong đó: X1: Là biến độc lập diameter 8
  • 9. Residuals Statisticsa Std. Minimum Maximum Mean Deviation N Predicted Value 73.38 97.56 79.11 3.514 816 Residual -60.483 31.517 .000 18.719 816 Std. Predicted -1.630 5.250 .000 1.000 816 Value Std. Residual -3.229 1.683 .000 .999 816 a. Dependent Variable: MTP Charts 9