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Statistic

Page 1 of 2

Soal ada di halaman 500 (Edisi 16 Lind) table 14-2

Step 1

Data Input

Cost (y)

Temperature (x1)

Insulation (x2)

Garage (x3)

250

35

3

0

360

29

4

1

165

36

7

0

43

60

6

0

92

65

5

0

200

30

5

0

355

10

6

1

290

7

10

1

230

21

9

0

120

55

2

0

73

54

12

0

205

48

5

1

400

20

5

1

320

39

4

1

72

60

8

0

272

20

5

1

94

58

7

0

190

40

8

1

235

27

9

0

139

30

7

0

Step 2

[pic 1]

Step 3

[pic 2]

Step 4

[pic 3]

[pic 4][pic 5][pic 6]

Dari Hasil Tersebut Didapat Persamaan:

y = 393.666 – 3.963temp – 11.334Ins + 77.432Garage

Garage ➔ merupakan variable Dummy (Karena nilainya terdiri dari 1 dan 0)

Step 5

Testing Hipotesis Terhadap Slope Temperature

  1. Ho : β1 = 0

H1 : β1 ≠ 0

  1. Critical Value tn-k-1,α/2 = t16, s%/2 = ± 2.119
  2. Test Stat T

T = b1 –βH0/Sb1

T = -3,963 – 0/0.653

T = - 0.0672

  1. Karena T statistik = - 6.072 < critical value = - 2,119

 Reject H0 terhadap α = 5%

  1. Jadi variable Temperature adalah siginificance vaiable yang mempengaruhi cost pada α = 5%

Testing Hipotesis Terhadap Slope Insulation

  1. Ho : β1 = 0

H1 : β1 ≠ 0

  1. Critical Value tn-k-1, α/2 = t16, s%/2 = ± 2.119
  2. Test Stat T

T = b1 –βH0/Sb1

T = -11,334 – 0/4.002

T = - 2,8320

  1. Karena T statistik = - 2.8320< critical value = - 2,119

 Reject H0 terhadap α = 5%

  1. Jadi variable Insulation adalah siginificance vaiable yang mempengaruhi cost pada α = 5%

Testing Hipotesis Terhadap Slope Garage

  1. Ho : β1 = 0

H1 : β1 ≠ 0

  1. Critical Value tn-k-1, α/2 = t16, s%/2 = ± 2.119
  2. Test Stat T

T = b1 –βH0/Sb1

T = 77.432 – 0/22.783

T = 3.39867

  1. Karena T statistik = 3.39867 > critical value =  2,119

 Reject H0 terhadap α = 5%

  1. Jadi variable Garage adalah siginificance vaiable yang mempengaruhi cost pada α = 5%

Tips dan trick

Gunakan nilai t untuk melihat signifikansi

Jika nilai t persamaan berada:

|2,1| → signifikan pada 5%

|3.4| → sangat signifikan pada 1%

[pic 7][pic 9][pic 10][pic 12][pic 13][pic 8][pic 11]

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