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MULTIPLE
CORRELATION




   Stat/Corrl/Sam 04
MULTIPLE CORRELATION ?

   Digunakan untuk mencari arah
    dan kuat lemahnya hubungan
    antara 2 atau lebih variabel
    independen (X1,X2...Xn) terhadap
    variabel dependen (Y) secara
    bersamaan

                Stat/Corrl/Sam 04
(X1)



            RX X2.Y
                  1
(Y)
                          rX X
                             1   2




                           X2
                          (X2)


      Stat/Corrl/Sam 04
RX X   1   2   Y



• R (Korelasi Ganda) ≠ (r + r + ...r )
                                   X1Y   X2 Y   XnY

• Korelasi Ganda merupakan hubungan
  secara bersama-sama antara X1
  dengan X2 terhadap Y



               Stat/Corrl/Sam 04
RUMUS
                  2              2
              r       X 1Y   r       X 2Y     2 rX 1Y rX 2Y rX 1 X 2
 RX 1 X 2.Y                                     2
                                            1 r X 1X 2

rX1Y = Korelasi Product Moment X1 dengan Y
rX2Y = Korelasi Product Moment X2 dengan Y
rX1X2 = Korelasi Product Moment X1 dengan X2


                              Stat/Corrl/Sam 04
PENGUJIAN SIGNIFIKANSI
                               2
                   R /k
          F       2
               1 R /n k 1

F = Koefisien signifikansi
k = Jumlah variabel independen
n = Jumlah sampel

                 Stat/Corrl/Sam 04
PENGUJIAN SIGNIFIKANSI
F hitung dibandingkan dengan F tabel
Kesimpulan:
 Jika F hitung ≥ F tabel, maka
  hubungan antar variabel dinyatakan
  signifikan
 Jika F hitung F tabel, maka
  hubungan antar variabel dinyatakan
  tidak signifikan
               Stat/Corrl/Sam 04
BACA TABEL F

Cara mencari F tabel
dk pembilang    =k
dk penyebut     =n–k-1


         Stat/Corrl/Sam 04
LATIHAN
 n       X1                  X2      Y
 1       23                  37      52
 2       26                  41      47
 3       24                  37      48
 4       19                  35      53
 5       32                  43      51
 6       25                  31      45
 7       21                  39      43
 8       21                  40      50
 9       29                  38      43
 10      30                  44      53
Total    250                385     485
Mean     25                 38,5    48,5
 SD     4,269               3,837   3,894
        Stat/Corrl/Sam 04
PARTIAL
CORRELATION




   Stat/Corrl/Sam 04
PARTIAL CORRELATION ?

   Digunakan untuk mencari arah
    dan kuat lemahnya hubungan
    antara 2 variabel independen
    (X1,X2)    terhadap    variabel
    dependen       (Y)      dengan
    mengendalikan     salah    satu
    variabel independennya

               Stat/Corrl/Sam 04
ILUSTRASI


Ini gara-gara
usia apa
berat badan
ya?




                               Apakah ada hubungan
                               antara berat badan dengan
                               kecepatan lari apabila
                               variabel usia dikontrol?
                 Stat/Corrl/Sam 04
ILUSTRASI



Berat Badan (X1)


r X1X2                                  Kecepatan Lari (Y)



   Usia (X2)

                    Stat/Corrl/Sam 04
R Y.X X    1    2




• R Y.X X = korelasi antara X dengan Y,
        1   2                                 1

 bila   X2 dikendalikan



                   rYX1               rYX 2 .rX1 X 2
  RY . X1 X 2
                            2                      2
                 1 r             X1 X 2    1 r         YX 2

                  Stat/Corrl/Sam 04
R Y.X X     2       1




• R Y.X X = korelasi antara X dengan Y,
        2   1                                2

 bila   X1 dikendalikan



                   rYX 2              rYX1 .rX1 X 2
  RY . X 2 X1
                            2                     2
                 1 r            X1 X 2     1 r        YX 1

                  Stat/Corrl/Sam 04
Pengujian Signifikansi

• Uji signifikansi pada korelasi
  partial menggunakan nilai t
                             rp n 3
                  t
                                          2
                                 1 r          p
 rp= Korelasi partial
                      Stat/Corrl/Sam 04

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Korelasi ganda-dan-partial

  • 1. MULTIPLE CORRELATION Stat/Corrl/Sam 04
  • 2. MULTIPLE CORRELATION ?  Digunakan untuk mencari arah dan kuat lemahnya hubungan antara 2 atau lebih variabel independen (X1,X2...Xn) terhadap variabel dependen (Y) secara bersamaan Stat/Corrl/Sam 04
  • 3. (X1) RX X2.Y 1 (Y) rX X 1 2 X2 (X2) Stat/Corrl/Sam 04
  • 4. RX X 1 2 Y • R (Korelasi Ganda) ≠ (r + r + ...r ) X1Y X2 Y XnY • Korelasi Ganda merupakan hubungan secara bersama-sama antara X1 dengan X2 terhadap Y Stat/Corrl/Sam 04
  • 5. RUMUS 2 2 r X 1Y r X 2Y 2 rX 1Y rX 2Y rX 1 X 2 RX 1 X 2.Y 2 1 r X 1X 2 rX1Y = Korelasi Product Moment X1 dengan Y rX2Y = Korelasi Product Moment X2 dengan Y rX1X2 = Korelasi Product Moment X1 dengan X2 Stat/Corrl/Sam 04
  • 6. PENGUJIAN SIGNIFIKANSI 2 R /k F 2 1 R /n k 1 F = Koefisien signifikansi k = Jumlah variabel independen n = Jumlah sampel Stat/Corrl/Sam 04
  • 7. PENGUJIAN SIGNIFIKANSI F hitung dibandingkan dengan F tabel Kesimpulan:  Jika F hitung ≥ F tabel, maka hubungan antar variabel dinyatakan signifikan  Jika F hitung F tabel, maka hubungan antar variabel dinyatakan tidak signifikan Stat/Corrl/Sam 04
  • 8. BACA TABEL F Cara mencari F tabel dk pembilang =k dk penyebut =n–k-1 Stat/Corrl/Sam 04
  • 9. LATIHAN n X1 X2 Y 1 23 37 52 2 26 41 47 3 24 37 48 4 19 35 53 5 32 43 51 6 25 31 45 7 21 39 43 8 21 40 50 9 29 38 43 10 30 44 53 Total 250 385 485 Mean 25 38,5 48,5 SD 4,269 3,837 3,894 Stat/Corrl/Sam 04
  • 10. PARTIAL CORRELATION Stat/Corrl/Sam 04
  • 11. PARTIAL CORRELATION ?  Digunakan untuk mencari arah dan kuat lemahnya hubungan antara 2 variabel independen (X1,X2) terhadap variabel dependen (Y) dengan mengendalikan salah satu variabel independennya Stat/Corrl/Sam 04
  • 12. ILUSTRASI Ini gara-gara usia apa berat badan ya? Apakah ada hubungan antara berat badan dengan kecepatan lari apabila variabel usia dikontrol? Stat/Corrl/Sam 04
  • 13. ILUSTRASI Berat Badan (X1) r X1X2 Kecepatan Lari (Y) Usia (X2) Stat/Corrl/Sam 04
  • 14. R Y.X X 1 2 • R Y.X X = korelasi antara X dengan Y, 1 2 1 bila X2 dikendalikan rYX1 rYX 2 .rX1 X 2 RY . X1 X 2 2 2 1 r X1 X 2 1 r YX 2 Stat/Corrl/Sam 04
  • 15. R Y.X X 2 1 • R Y.X X = korelasi antara X dengan Y, 2 1 2 bila X1 dikendalikan rYX 2 rYX1 .rX1 X 2 RY . X 2 X1 2 2 1 r X1 X 2 1 r YX 1 Stat/Corrl/Sam 04
  • 16. Pengujian Signifikansi • Uji signifikansi pada korelasi partial menggunakan nilai t rp n 3 t 2 1 r p rp= Korelasi partial Stat/Corrl/Sam 04