UJI VALIDITAS DAN UJI RELIABILITAS
Dari tabel di bawah ini lakukanlah : 1. Uji Validitas
2. Uji Reliabilitas
RESP. Nomor Pertanyaan Total
UJI VALIDITAS
32 328 1153 118 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.530 - 10.496 r= 1034 r= 0,88
[1180 - 1024] [116.440 - 107.584] 1175,3876
Pertanyaan 2
32 328 1171 122 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.710 - 10.496 r= 1214 r= 0,92
[1220 - 1024] [116.440 - 107.584] 1317,4885
X Y XY X² Y²
32 328 1161 118 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.610 - 10.496 r= 1114 r= 0,95
[1180 - 1024] [116.440 - 107.584] 1175,3876
Pertanyaan 4
32 328 1150 118 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.500 - 10.496 r= 1004 r= 0,85
[1180 - 1024] [116.440 - 107.584] 1175,3876
Pertanyaan 5
X Y XY X² Y²
4 45 180 16 2025
32 328 1167 120 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.670 - 10.496 r= 1174 r= 0,94
[1200 - 1024] [116.440 - 107.584] 1248,4615
Pertanyaan 6
34 328 1208 132 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 12.080 - 11.152 r= 928 = 0,77 r
[1320 - 1156] [116.440 - 107.584] 1205,149
Pertanyaan 7
X Y XY X² Y²
4 45 180 16 2025
5 45 225 25 2025
4 38 152 16 1444
34 328 1205 126 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 12.050 - 11.152 r= 898 r= 0,94
[1260 - 1156] [116.440 - 107.584] 959,69995
Pertanyaan 8
33 328 1186 125 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.860 - 10.824 r= 1036 r= 0,87
[1250 - 1089] [116.440 - 107.584] 1194,0754
4 34 136 16 1156
31 328 1133 115 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.330 - 10.168 r= 1162 = 0,90 r
[1150 - 961] [116.440 - 107.584] 1293,748
Pertanyaan 10
36 328 1110 160 11644
r = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
r = 11.100 - 11.808 r= -708 r= -0,43
[1600 - 1296] [116.440 - 107.584] 1640,7998
Hasil uji vaiditas secara ringkas disajikan pada tabel di bawah ini :
r-hitung r-tabel Validitas
Pertanyaan 1 0,88 0,765 Valid
Pertanyaan 2 0,92 0,765 Valid
Pertanyaan 3 0,95 0,765 Valid
Pertanyaan 4 0,85 0,765 Valid
Pertanyaan 6 0,77 0,765 Valid
Pertanyaan 7 0,94 0,765 Valid
Pertanyaan 8 0,87 0,765 Valid
Pertanyaan 9 0,90 0,765 Valid
Pertanyaan 10 -0,43 0,765 Tidak Valid
*tingkat signifikan 1%
* Bila angka r hitung > r tabel maka berarti signifikan valid
Jadi berdasarkan hasil uji validitas di atas pertanyaan 1 sampai Pertanyaan 9 memiliki r hitung yang lebih besar dari r tabel sehingga dinyatakan VALID sedangkan untuk pertanyaan 10, r hitung lebih kecil dari r tabel yang berarti TIDAK VALID.
UJI RELIABILITAS
Data untuk belahan pertama (item ganjil)
RESP. Nomor Pertanyaan Total
1 3 5 7 9
A 5 5 5 4 4 23
B 4 4 4 5 5 22
D 5 4 4 4 4 21
Data untuk belahan kedua (item genap)
RESP. Nomor Pertanyaan Total
2 4 6 8
Karena pada uji validitas item pertanyaan nomor 10 tidak valid, maka pada saat uji reliabilitas item pertanyaan nomor 10 tidak dimasukkan dalam perhitungan.
Korelasi skor total belahan pertama dengan skor total belahan kedua
7 6 42 49 36
21 18 378 441 324
11 9 99 121 81
161 131 2364 2931 1925
rb = N (∑XY)-(∑X∑Y)
[N∑X²- (∑X)²] [N∑Y² - (∑Y)²]
rb = 23.640 - 21.091 r= 2549 r= 0,96
[29.310 - 25.921] [19.250 - 17.161] 2660,756
Rtotal = 2 (rb)
Correlations
P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 TOTAL
P1 Pearson Correlation 1 .835** .872** .615 .881** .825** .722* .656* .745* -.468 .880**
Sig. (2-tailed) .003 .001 .058 .001 .003 .018 .039 .013 .172 .001
N 10 10 10 10 10 10 10 10 10 10 10
P2 Pearson Correlation .835** 1 .835** .778** .840** .736* .925** .754* .821** -.500 .921**
Sig. (2-tailed) .003 .003 .008 .002 .015 .000 .012 .004 .141 .000
N 10 10 10 10 10 10 10 10 10 10 10
P3 Pearson Correlation .872** .835** 1 .744* .941** .700* .879** .909** .862** -.514 .948**
Sig. (2-tailed) .001 .003 .014 .000 .024 .001 .000 .001 .128 .000
N 10 10 10 10 10 10 10 10 10 10 10
P4 Pearson Correlation .615 .778** .744* 1 .760* .763* .879** .719* .804** -.514 .854**
Sig. (2-tailed) .058 .008 .014 .011 .010 .001 .019 .005 .128 .002
N 10 10 10 10 10 10 10 10 10 10 10
P5 Pearson Correlation .881** .840** .941** .760* 1 .718* .828** .855** .811** -.484 .940**
Sig. (2-tailed) .001 .002 .000 .011 .019 .003 .002 .004 .156 .000
N 10 10 10 10 10 10 10 10 10 10 10
P6 Pearson Correlation .825** .736* .700* .763* .718* 1 .720* .418 .772** -.690* .770**
Sig. (2-tailed) .003 .015 .024 .010 .019 .019 .229 .009 .027 .009
N 10 10 10 10 10 10 10 10 10 10 10
P7 Pearson Correlation .722* .925** .879** .879** .828** .720* 1 .835** .899** -.529 .936**
Sig. (2-tailed) .018 .000 .001 .001 .003 .019 .003 .000 .116 .000
N 10 10 10 10 10 10 10 10 10 10 10
P8 Pearson Correlation .656* .754* .909** .719* .855** .418 .835** 1 .728* -.307 .868**
Sig. (2-tailed) .039 .012 .000 .019 .002 .229 .003 .017 .388 .001
N 10 10 10 10 10 10 10 10 10 10 10
P9 Pearson Correlation .745* .821** .862** .804** .811** .772** .899** .728* 1 -.567 .898**
Sig. (2-tailed) .013 .004 .001 .005 .004 .009 .000 .017 .087 .000
N 10 10 10 10 10 10 10 10 10 10 10
P10 Pearson Correlation -.468 -.500 -.514 -.514 -.484 -.690* -.529 -.307 -.567 1 -.431
Sig. (2-tailed) .172 .141 .128 .128 .156 .027 .116 .388 .087 .213
Hasil uji vaiditas secara ringkas disajikan pada tabel di bawah ini :
r-hitung r-tabel Validitas
Pertanyaan 1 0,88 0,765 Valid
Pertanyaan 2 0,92 0,765 Valid
Pertanyaan 3 0,95 0,765 Valid
Pertanyaan 4 0,85 0,765 Valid
Pertanyaan 5 0,94 0,765 Valid
Pertanyaan 6 0,77 0,765 Valid
Pertanyaan 7 0,94 0,765 Valid
Pertanyaan 8 0,87 0,765 Valid
Pertanyaan 9 0,90 0,765 Valid
Pertanyaan 10 -0,43 0,765 Tidak Valid
*tingkat signifikan 1%
* Bila angka r hitung > r tabel maka berarti signifikan valid
HASIL UJI RELIABILITAS DENGAN MENGGUNAKAN SPSS VERSI 17.0
Reliability
Case Processing Summary
N %
Cases Valid 10 100.0
Excludeda 0 .0
Total 10 100.0
a. Listwise deletion based on all variables in the procedure.
Reliability Statistics
Cronbach's
Alpha N of Items
.970 9
Scale: ALL VARIABLES
Item Statistics
Mean Std. Deviation N
Item-Total Statistics
Scale Mean if Item Deleted
Scale Variance if Item Deleted
Corrected Item-Total Correlation
Cronbach's Alpha if Item
Deleted
P1 26.00 94.000 .853 .967
P2 26.00 90.000 .905 .965
P3 26.00 92.000 .941 .963
P4 26.00 94.444 .834 .968
P5 26.00 90.889 .925 .964
P6 25.80 95.289 .774 .970
P7 25.80 96.622 .934 .965
P8 25.90 94.767 .805 .969
P9 26.10 90.767 .893 .965
Scale Statistics
Mean Variance Std. Deviation N of Items