Analisa Faktor yang Mempengaruhi Tingkat Kepuasan Pasien Terhadap Pelayanan Rumah Sakit Umum Kota Padang Sidimpuan

39

LAMPIRAN 1
KUESIONER
ANALISIS FAKTOR YANG MEMPENGARUHI TINGKAT KEPUASAN
PASIEN TERHADAP PELAYANAN RUMAH SAKIT UMUM
KOTA PADANG SIDIMPUAN
Survey ini adalah survey untuk penulisan skripsi di Fakultas Matematika dan Ilmu
Pengetahuan Alam Universitas Sumatera Utara (USU), oleh karena itu sebagai
peneliti akan sangan berterima kasih jika Bapak/Ibu/Saudara/Saudari bersedia
mengisi dan menjawab setiap pertanyaan dengan sukarela.
Adapun cara pengisian dari jawaban saudar/i antara lain:
1. Mohon dengan hormat bantuan saudara/i untuk mengisi seluruh
pernyataan yang ada.
2. Pada kuesioner ini terdapat 6 variabel.
3. Berilah tanda (√) atau tanda (×). Cukup 1 (satu) kali pengisian pada
setiap pernyataan.
4. Ada 5 (lima) alternative jawaban,yaitu
SS

= SangatSetuju


S

= Setuju

CS

= Cukup Setuju

TS

= Tidak Setuju

STS

= SangatTidakSetuju

IDENTITAS RESPONDEN

NO


Nama

:

Usia

: …………… Tahun

JenisKelamin

:[

]Laki-laki

PERNYATAAN

[

]Perempuan


SB

B

CB

KB

STB

39
Universitas Sumatera Utara

40

1

2


3

4
5
6

Memberikan asuhan keperawatan secara
menyeluruh/holistik pada pasien dan
bertanggung jawab dan berani megambil
keputusan yang tepat, saat melakukan
tindakan keperawatan
Rumah sakit umum sidimpuan terlihat
bersih. Kelengkapan, kesiapan dan
kebersihan alat-alat yang dipakai juga
modern
Pelayanan Rumah sakit umum Padang
Sidimpuan yang profesional, ramah dan
selalu
tanggap
dalam

membantu
pengobatan pasien.
Obat dijual dengan harga yang wajar dan
cepat dalam memberikan pelayanan
Petugas memberikan pelayanan kepada
konsumen tanpa memandang stratus sosial.
Terjadinya komunikasi antara petugas dan
konsumen..

40
Universitas Sumatera Utara

41

LAMPIRAN 2
TABULASI DATA PENELITIAN RESPONDEN
NO
1
2
3

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42


X1
3
3
3
5
5
5
5
5
4
4
4
3
5
3
5
3
5
4
4

5
4
4
4
3
5
3
5
3
5
4
4
5
3
3
3
5
5
5
5

5
3
5

X2
4
3
4
5
5
5
5
5
5
5
3
3
4
4
4

4
4
5
4
5
5
5
3
3
4
4
4
4
4
5
4
5
4
3
4
5
5
5
5
5
3
4

X3
5
4
4
5
5
5
5
5
5
4
4
4
5
5
4
3
5
4
5
5
5
4
4
4
5
5
4
3
5
4
5
5
4
4
5
5
5
5
5
4
4
5

X4
5
5
4
5
5
5
5
5
5
5
4
3
4
5
4
4
4
5
4
3
5
5
4
3
4
5
4
4
4
5
4
3
5
5
4
5
5
5
5
5
3
4

X5
2
4
3
2
3
4
4
5
4
2
3
3
3
3
4
3
4
4
3
5
3
4
3
4
4
4
5
5
2
4
4
3
4
4
3
3
4
4
4
3
3
4

X6
2
2
2
2
2
2
5
4
4
3
4
2
4
5
1
1
4
4
4
5
4
5
5
3
3
2
2
2
3
4
4
4
4
4
4
4
5
5
5
5
3
3

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Universitas Sumatera Utara

42

43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70

3
5
3
5
4
4
5
3
3
3
3
3
5
5
5
5
5
4
4
4
3
5
3
5
3
5
4
4

4
4
4
4
5
4
5
4
3
4
3
4
5
5
5
5
5
5
5
3
3
4
4
4
4
4
5
4

5
4
3
5
4
5
5
5
4
5
4
4
5
5
5
5
5
5
5
4
4
4
5
5
4
3
5
4

5
4
4
4
5
4
3
5
5
5
5
4
5
5
5
5
5
5
5
4
3
4
5
4
4
4
4
4

2
4
4
4
5
5
4
4
3
5
2
3
3
4
4
5
5
5
5
5
3
3
2
2
2
2
4
4

3
3
3
3
4
4
4
2
2
2
3
4
2
2
2
2
4
4
4
5
5
5
3
3
3
3
3
5

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43

LAMPIRAN 3
SUCCESIVE DETAIL PENSKALAAN
SUCCESIVE DETAIL
Col
Category
Freq
1
3.000
23.000
4.000
17.000
5.000
30.000
2

3

4

5

6

3.000
4.000
5.000
3.000
4.000
5.000
3.000
4.000
5.000
2.000
3.000
4.000
5.000
1.000
2.000
3.000
4.000
5.000

11.000
31.000
28.000
4.000
26.000
40.000
7.000
27.000
36.000
10.000
20.000
28.000
12.000
2.000
17.000
16.000
22.000
13.000

Prop
0.329
0.243
0.429

Cum
0.329
0.571
1.000

Density
0.362
0.393
0

Z
-0.444
0.180

Scale
1.000
1.973
3.016

0.157
0.443
0.400
0.057
0.371
0.571
0.100
0.386
0.514
0.143
0.286
0.400
0.171
0.0286
0.2429
0.2286
0.3143
0.1857

0.157
0.600
1.000
0.057
0.429
1.000
0.100
0.486
1.000
0.143
0.429
0.829
1.000
0.0286
0.2714
0.5000
0.8143
1.0000

0.240
0.386
0.000
0.115
0.393
0.000
0.175
0.399
0.000
0.226
0.393
0.254
0.000
0.0653
0.3315
0.3989
0.2676
0.0000

-1.006
0.253

1.000
2.201
3.496
1.000
2.258
3.693
1.000
2.176
3.530
1.000
1.995
2.925
4.064
1.0000
2.1909
2.9919
3.7049
4.7277

-1.579
-0.180
-1.282
-0.036
-1.068
-0.180
0.949
-1.9022
-0.6085
0.0000
0.8938

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44

LAMPIRAN 4
HASIL SKALA AKHIR SUCCESIVE INTERVAL TIAP VARIABEL
NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

X1
1.000
1.000
1.000
3.016
3.016
3.016
3.016
3.016
1.973
1.973
1.973
1.000
3.016
1.000
3.016
1.000
3.016
1.973
1.973
3.016
1.973
1.973
1.973
1.000
3.016
1.000
3.016
1.000
3.016
1.973
1.973
3.016
1.000
1.000
1.000
3.016
3.016
3.016
3.016
3.016
1.000
3.016

X2
2.201
1.000
2.201
3.496
3.496
3.496
3.496
3.496
3.496
3.496
1.000
1.000
2.201
2.201
2.201
2.201
2.201
3.496
2.201
3.496
3.496
3.496
1.000
1.000
2.201
2.201
2.201
2.201
2.201
3.496
2.201
3.496
2.201
1.000
2.201
3.496
3.496
3.496
3.496
3.496
1.000
2.201

X3
3.693
2.258
2.258
3.693
3.693
3.693
3.693
3.693
3.693
2.258
2.258
2.258
3.693
3.693
2.258
1.000
3.693
2.258
3.693
3.693
3.693
2.258
2.258
2.258
3.693
3.693
2.258
1.000
3.693
2.258
3.693
3.693
2.258
2.258
3.693
3.693
3.693
3.693
3.693
2.258
2.258
3.693

X4
3.530
3.530
2.176
3.530
3.530
3.530
3.530
3.530
3.530
3.530
2.176
1.000
2.176
3.530
2.176
2.176
2.176
3.530
2.176
1.000
3.530
3.530
2.176
1.000
2.176
3.530
2.176
2.176
2.176
3.530
2.176
1.000
3.530
3.530
2.176
3.530
3.530
3.530
3.530
3.530
1.000
2.176

X5
1.000
2.925
1.995
1.000
1.995
2.925
2.925
4.064
2.925
1.000
1.995
1.995
1.995
1.995
2.925
1.995
2.925
2.925
1.995
4.064
1.995
2.925
1.995
2.925
2.925
2.925
4.064
4.064
1.000
2.925
2.925
1.995
2.925
2.925
1.995
1.995
2.925
2.925
2.925
1.995
1.995
2.925

X6
2.191
2.191
2.191
2.191
2.191
2.191
4.728
3.705
3.705
2.992
3.705
2.191
3.705
4.728
1.000
1.000
3.705
3.705
3.705
4.728
3.705
4.728
4.728
2.992
2.992
2.191
2.191
2.191
2.992
3.705
3.705
3.705
3.705
3.705
3.705
3.705
4.728
4.728
4.728
4.728
2.992
2.992

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Universitas Sumatera Utara

45

43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70

1.000
3.016
1.000
3.016
1.973
1.973
3.016
1.000
1.000
1.000
1.000
1.000
3.016
3.016
3.016
3.016
3.016
1.973
1.973
1.973
1.000
3.016
1.000
3.016
1.000
3.016
1.973
1.973

2.201
2.201
2.201
2.201
3.496
2.201
3.496
2.201
1.000
2.201
1.000
2.201
3.496
3.496
3.496
3.496
3.496
3.496
3.496
1.000
1.000
2.201
2.201
2.201
2.201
2.201
3.496
2.201

3.693
2.258
1.000
3.693
2.258
3.693
3.693
3.693
2.258
3.693
2.258
2.258
3.693
3.693
3.693
3.693
3.693
3.693
3.693
2.258
2.258
2.258
3.693
3.693
2.258
1.000
3.693
2.258

3.530
2.176
2.176
2.176
3.530
2.176
1.000
3.530
3.530
3.530
3.530
2.176
3.530
3.530
3.530
3.530
3.530
3.530
3.530
2.176
1.000
2.176
3.530
2.176
2.176
2.176
2.176
2.176

1.000
2.925
2.925
2.925
4.064
4.064
2.925
2.925
1.995
4.064
1.000
1.995
1.995
2.925
2.925
4.064
4.064
4.064
4.064
4.064
1.995
1.995
1.000
1.000
1.000
1.000
2.925
2.925

2.992
2.992
2.992
2.992
3.705
3.705
3.705
2.191
2.191
2.191
2.992
3.705
2.191
2.191
2.191
2.191
3.705
3.705
3.705
4.728
4.728
4.728
2.992
2.992
2.992
2.992
2.992
4.728

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Universitas Sumatera Utara

7

LAMPIRAN 5
HASIL OUTPUT SPSS
HASIL PERHITUNGAN UJI VALIDITAS
Correlations
X1
X1

Pearson Correlation

X2
1

Sig. (2-tailed)
N
X2

Pearson Correlation
Sig. (2-tailed)
N

X3

Pearson Correlation
Sig. (2-tailed)

.569

X6

SCORETOTAL

**

.027

.174

.166

.000

.001

.822

.150

.170

.000

70

70

70

70

70

70

1

**

**

.235

.134

.000

.000

.051

.269

.000

70

70

70

70

70

1

*

.086

.108

.035

.477

.375

.000
70

.569

.000
70

70

**

**

.394

X5

.445

.394

.445

.425

.252

**

.431

**

.697

**

.551

.000

70

70

70

70

70

70

Pearson Correlation

.027

**

*

1

.060

-.061

Sig. (2-tailed)

.822

.000

.035

.622

.617

.000

70

70

70

70

70

70

70

.174

.235

.086

.060

1

.134

N
X5

**

**

X4

.001

N
X4

70

X3

Pearson Correlation

.425

.252

**

.473

**

.574

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Universitas Sumatera Utara

8

Sig. (2-tailed)

.150

.051

.477

.622

70

70

70

70

Pearson Correlation

.166

.134

.108

Sig. (2-tailed)

.170

.269

70

70

N
X6

N
SCORETOTAL

Pearson Correlation
Sig. (2-tailed)
N

**

.431

**

.697

.270

.000

70

70

70

-.061

.134

1

.375

.617

.270

70

70

70

**

.551

.473

**

**

.574

**

.586

.000
70

70

**

1

.586

.000

.000

.000

.000

.000

.000

70

70

70

70

70

70

70

**. Correlation is significant at the 0.01 level (2-tailed).
*. Correlation is significant at the 0.05 level (2-tailed).

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Universitas Sumatera Utara

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Lanjutan Lampiran 5

HASIL PERHITUNGAN RELIABILITAS

Case Processing Summary
N
Cases

Valid
a

Excluded
Total

%
70

100.0

0

.0

70

100.0

a. Listwise deletion based on all variables in the
procedure.

Reliability Statistics
Cronbach's Alpha
Based on
Cronbach's Alpha Standardized Items
.614

.614

N of Items
6

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Universitas Sumatera Utara

10

Item-Total Statistics
Cronbach's
Scale Mean if
Item Deleted

Scale Variance if Corrected ItemItem Deleted

Total Correlation

Alpha if Item
Deleted

X1

20.16

5.526

.431

.461

X2

20.01

5.522

.697

.403

X3

19.74

6.426

.551

.496

X4

19.84

6.975

.473

.569

X5

20.66

6.113

.574

.562

X6

20.87

5.882

.586

.620

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Universitas Sumatera Utara

11

Lanjutan Lampran 5

Correlation Matrix
x1
Correlation

Sig. (1-tailed)

x2

a

x3

x4

x5

x6

x1

1.000

.566

.398

.021

.166

.160

x2

.566

1.000

.452

.434

.235

.130

x3

.398

.452

1.000

.260

.086

.102

x4

.021

.434

.260

1.000

.059

-.049

x5

.166

.235

.086

.059

1.000

.122

x6

.160

.130

.102

-.049

.122

1.000

.000

.000

.431

.085

.093

.000

.000

.025

.142

.015

.240

.200

.312

.343

x1
x2

.000

x3

.000

.000

x4

.431

.000

.015

x5

.085

.025

.240

.312

x6

.093

.142

.200

.343

.157
.157

a. Determinant = ,337

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Universitas Sumatera Utara

12

Lanjutan Lampiran 5

Anti-image Matrices
x1
Anti-image Covariance

Anti-image Correlation

x2

x3

x4

x5

x6

x1

.582

-.275

-.149

.204

-.020

-.044

x2

-.275

.466

-.113

-.271

-.108

-.042

x3

-.149

-.113

.747

-.109

.026

-.039

x4

.204

-.271

-.109

.714

.021

.077

x5

-.020

-.108

.026

.021

.934

-.084

x6

-.044

-.042

-.039

.077

-.084

.955

x1

.552

a

-.527

-.226

.316

-.027

-.060

x2

-.527

.581

a

-.191

-.470

-.164

-.062

x3

-.226

-.191

.799

a

-.149

.031

-.046

x4

.316

-.470

-.149

.526

a

.025

.094

x5

-.027

-.164

.031

.025

.744

a

-.089

x6

-.060

-.062

-.046

.094

-.089

.728

a

a. Measures of Sampling Adequacy(MSA)

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13

Lanjutan lampiran 5

KMO and Bartlett's Test
Kaiser-Meyer-Olkin Measure of Sampling Adequacy.
Bartlett's Test of Sphericity

Approx. Chi-Square
df
Sig.

.591
71.964
15
.000

Communalities
Initial

Extraction

x1

1.000

.603

x2

1.000

.770

x3

1.000

.518

x4

1.000

.670

x5

1.000

.566

x6

1.000

.529

Extraction Method: Principal
Component Analysis.

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Lanjutan Lampiran 5

Total Variance Explained
Initial Eigenvalues

Compon
ent

Total

% of Variance

Extraction Sums of Squared Loadings

Cumulative %

Total

% of Variance

Cumulative %

Rotation Sums of Squared Loadings
Total

% of Variance

Cumulative %

1

2.221

37.011

37.011

2.221

37.011

37.011

2.000

33.338

33.338

2

1.136

18.939

55.950

1.136

18.939

55.950

1.357

22.612

55.950

3

.922

15.367

71.317

4

.835

13.910

85.228

5

.594

9.905

95.133

6

.292

4.867

100.000

Extraction Method: Principal Component Analysis.

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Lanjutan lampiran 5

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Lanjutan Lampiran 5
Component Matrix

a

Component Transformation
Matrix

Component
1

2

Compo
nent

1

2

x1

.727

.273

x2

.869

-.120

1

.893

.451

x3

.709

-.125

2

-.451

.893

x4

.480

-.663

Extraction Method: Principal

x5

.366

.363

x6

.264

.678

Component Analysis.
Rotation Method: Varimax with
Kaiser Normalization.

Extraction Method: Principal
Component Analysis.
a. 2 components extracted.

Rotated Component Matrix

a

Component
1

2

x1

.526

.572

x2

.830

.285

x3

.689

.208

x4

.727

-.376

x5

.163

.489

x6

-.070

.724

Extraction Method: Principal
Component Analysis.
Rotation Method: Varimax with
Kaiser Normalization.
a. Rotation converged in 3
iterations.

15
Universitas Sumatera Utara

16

LAMPIRAN 6
Secara manual mencari nilai Cronback Alpha pertama dengan mencari nilai variansi dari masing-masing variabel dengan rumus sebagai
berikut:
=

1

2

3



)2

2− (

=
=
=

82369−

287 2
70

70
88209−

297 2
70

70
99856−

316 2
70

70

= 1159,89

4

= 1242,127

5

= 1406,136

6

=
=

306 2
70

70
63504−

252 2
70

70
1990921−

= 1344,528
= 894,24

1411 2
70

70

= 790,9512

= 1159,89 + 1242,127 + 1406,136 + 1344,528 + 894,24 + 790,9512 = 6837.872

Mencari Nilai Variansi total:


=

95481−

=

28823−
70

1411 2
70

Mencari Nilai Alpha:

= 5,446

=
=
`

−1

6

6−1

= 0,614

1−

1−

�2

�2

6837.872
5,446

= 1,2 1254,576

16
Universitas Sumatera Utara

17

LAMPIRAN 7
Perhitungan Korelasi Produck Momen X2
Nomor
Responden
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
.
.
.
70
Jumlah

X2

Y

X2Y

X22

Y2

4
3
4
5
5
5
5
5
5
5
3
3
4
4
4
4
4
5
.
.
.

17
18
16
19
20
21
24
24
22
18
19
15
21
21
18
14
22
21
.
.
.
21
1401

68
54
64
95
100
105
120
120
110
90
57
45
84
84
72
56
88
105
.
.
.
84
6014

16
9
16
25
25
25
25
25
25
25
9
9
16
16
16
16
16
25
.
.
.
16
1295

289
324
256
361
400
441
576
576
484
324
361
225
441
441
324
196
484
441
.
.
.
441
28421

4
297
2

2

=

2

=

1

=

2

=

2

=

2

=

2

= 0,697

2
2−(

{

−(

2)

2 }{

2.

)
2− (

)2 }

70 6014 − ( 297 1401 )
70 1295 − 297 2 {70 28421 − 1401 2 }
420980−416097

90650−88209 (1989470−1962801)
4883
(2441)(26669)
4883
√65099029
4883

8068,397

17
Universitas Sumatera Utara

18

Perhitungan Korelasi Produck Momen X3
Nomor
Responden
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
.
.
.
70
Jumlah
3

X3

Y

X3Y

X32

Y2

5
4
4
5
5
5
5
5
5
4
4
4
5
5
4
3
5
4
.
.
.

16
17
16
19
20
21
24
24
22
19
18
14
20
20
18
15
21
22
.
.
.
21
1382

80
68
64
95
100
105
120
120
110
76
72
56
100
100
72
45
105
88
.
.
.
84
6282

25
16
16
25
25
25
25
25
25
16
16
16
25
25
16
9
25
16
.
.
.
16
1452

256
289
256
361
400
441
576
576
484
361
324
196
400
400
324
225
441
484
.
.
.
441
27728

4
316
3

=

2
3−(

{

−(

3

)2 }{

3.

)
2− (

)2 }

70 6282 − ( 316 1382 )

3

=

3

=

3

=

3

=

3

=

3

= 0,551

70 1452 − 316 2 {70 27728 − 1382 2 }
439740−436712

101640−99856 (1940960−1909924)
3028
(1784)(31036)
3028
√55368224
3028

7440,983

18
Universitas Sumatera Utara

19

Perhitungan Korelasi Produck Momen X4
Nomor
Responden
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
.
.
.
70
Jumlah
4

4

=

2
4−(

{

X4

Y

X4Y

X42

Y2

5
5
4
5
5
5
5
5
5
5
4
3
4
5
4
4
4
5
.
.
.
4
309

16
16
16
19
20
21
24
24
22
18
18
15
21
20
18
14
22
21
.
.
.
21
1389

80
80
64
95
100
105
120
120
110
90
72
45
84
100
72
56
88
105
.
.
.
84
6153

25
25
16
25
25
25
25
25
25
25
16
9
16
25
16
16
16
25
.
.
.
16
1395

256
256
256
361
400
441
576
576
484
324
324
225
441
400
324
196
484
441
.
.
.
441
28043

−(

4

)2 }{

4.

)
2− (

)2 }

70 6153 − ( 309 1389 )

4

=

4

=

4

=

4

=

4

=

4

= 0,473

70 1395 − 309 2 {70 28043 − 1389 2 }
430710 −429201

97650−95481 (1963010−1929321)
1509
(2169)(33689)
1509
√73071441
1509

8548,183

19
Universitas Sumatera Utara

20

Perhitungan Korelasi Produck Momen X5
Nomor
Responden
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
.
.
.
70
Jumlah
5

5

=

2
5−(

{

X5

Y

X5Y

X52

Y2

2
4
3
2
3
4
4
5
4
2
3
3
3
3
4
3
4
4
.
.
.
4
252

19
17
17
22
22
22
25
24
23
21
19
15
22
22
18
15
22
22
.
.
.
21
1446

38
68
51
44
66
88
100
120
92
42
57
45
66
66
72
45
88
88
.
.
.
84
5242

4
16
9
4
9
16
16
25
16
4
9
9
9
9
16
9
16
16
.
.
.
16
968

361
289
289
484
484
484
625
576
529
441
361
225
484
484
324
225
484
484
.
.
.
441
30292

−(

5

)2 }{

5.

)
2− (

)2 }

70 5242 − ( 252 1446 )

5

=

5

=

5

=

5

=

5

=

5

= 0,574

70 968 − 252 2 {70 30292 − 1446 2 }
366940−364392

67760−63504 (2120440 −2090916)
2548

(4256)(29624)
2548
√125654144
2548

11209,556

20
Universitas Sumatera Utara

21

Perhitungan Korelasi Produck Momen X6
Nomor
Responden
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
.
.
.
70
Jumlah
6

6

=

2
6−(

{

X6

Y

X6Y

X62

Y2

2
2
2
2
2
2
5
4
4
3
4
2
4
5
1
1
4
4
.
.
.
5
237

19
19
18
22
23
24
24
25
23
20
18
16
21
20
21
17
22
22
.
.
.
20
1461

38
38
36
44
46
48
120
100
92
60
72
32
84
100
21
17
88
88
.
.
.
100
4977

4
4
4
4
4
4
25
16
16
9
16
4
16
25
1
1
16
16
.
.
.
25
891

361
361
324
484
529
576
576
625
529
400
324
256
441
400
441
289
484
484
.
.
.
400
30899

−(

6

)2 }{

6.

)
2− (

)2 }

70 4977 − ( 237 1461 )

6

=

6

=

6

=

6

=

6

=

6

= 0,586

70 891 − 237 2 {70 30899 − 1461 2 }
348390−346257

62370−56169 (2162930−2134521)
2133
(6201)(28409)
2133
√176164209
2133

13272,687

21
Universitas Sumatera Utara