SOAL NO 1

Untuk mengetahui Validitas 5 (lima) Butir Soal yang diujikan pada UTS minggu lalu, maka gunakan Angka Indeks Korelasi Point Biserial berdasarkan data yang diambil dari jawaban hasil ujian mahasiswa secara acak sebanyak 10 mahasiswa, seperti Tabel 1. dibawah , dengan catatan sekor = 0 untuk jawaban salah dan sekor =1 untuk jawaban betul :Menggunakan analisis scale:

A. Tabel 1 (sekor sesuai soal)Tabel 1. Sekor yang dicapai untuk setiap butir nomor soal.

TesteeSoal No 1

(Sekor)Soal No 2

(Sekor)Soal No 3

(Sekor)Soal No 4

(Sekor)Soal No 5

(Sekor)Toatal

A 0.0 0.0 0.0 1.0 1.0 2.0B 0.0 1.0 1.0 0.0 1.0 3.0C 0.0 0.0 1.0 1.0 0.0 2.0D 1.0 1.0 0.0 1.0 0.0 3.0E 0.0 0.0 1.0 0.0 1.0 2.0F 1.0 0.0 0.0 1.0 1.0 3.0G 0.0 1.0 1.0 0.0 1.0 3.0H 1.0 0.0 1.0 1.0 0.0 3.0I 1.0 1.0 0.0 1.0 1.0 4.0J 0.0 1.0 1.0 0.0 1.0 3.0

Keterangan:A – J: Nama Peserta Tes1 : Sekor jawaban benar0 : Sekor jawaban soal salah

Tabel 4. Inter-Item Correlation Matrix

Soal_No1 Soal_No2 Soal_No3 Soal_No4 Soal_No5 Total

Soal_No1 1.000 .000 -.583 .667 -.356 .612

Soal_No2 .000 1.000 .000 -.408 .218 .667

Soal_No3 -.583 .000 1.000 -.667 -.089 -.272

Soal_No4 .667 -.408 -.667 1.000 -.535 .068

Soal_No5 -.356 .218 -.089 -.535 1.000 .145

Total .612 .667 -.272 .068 .145 1.000

Hasil Pengolahan Menggunakan SPSSTabel 2 Reliability Statistics

Cronbach's Alphaa

-.083Cronbach's

Alpha Based on

Standardized

ItemsaN of Items -.259 6

a. The value is negative due to a negative average covariance among items. This violates reliability model assumptions. You may want to check item codings.

Tabel 3. Item-Total Statistics

Scale Mean if

Item Deleted

Scale Variance

if Item Deleted

Corrected

Item-Total

Correlation

Squared Multiple

Correlation

Cronbach's

Alpha if Item

Deleted

Soal_No1 5.20 1.067 .250 . -.443a

Soal_No2 5.10 .989 .318 . -.562a

Soal_No3 5.00 2.222 -.577 . .438

Soal_No4 5.00 1.778 -.323 . .234

Soal_No5 4.90 1.656 -.232 . .134

Total 2.80 .400 1.000 . -2.847a

a. The value is negative due to a negative average covariance among items. This violates

reliability model assumptions. You may want to check item codings.

Analisis Hasil Pengolahan dari SPSS:1. Cronbach”s Alpha, Tabel 2 Merupakan salah satu koefisien realibilitas, skala pengukuran yang realibility adalah minimal 0.70 (Nunnaly, 1978; Nunnaly and

Berrnstein, 1994) Diintrepetasikan sebagai korelasi dari skala yang diamati (observerd scale) dengan semua kemungkinan pengukuran skala lain yang

mengukur hal yang sama dan menggunakan jumlah butir pertanyaan yang sama Nilai Cronbach’s Alpha berkisar antara 0 dan 1, dimungkinkan untuk memeriksa codings item Nilai Cronbach’s Alpha pada masing-masing nomor soal rendah, yaitu di bawah 0.70, 2. Corrected Item-Total Correlation (Tabel 3), jika bernilai negative berarti arah pengkodean dari butir butir tersebut berlawanan atau

terbalik dengan arah pengkodean butir yang lain. Butir-butir dimaksud adalah soal 3, 4, 5 harus dibalik pengkodeannya.

3. Square Multiple Correlation,4. Soal No 3 mempunyai korelasi negatf dengan Total Nilai (Square Multiple Correlation, bernilai negative),

5. Membandingkan bentuk kurva normal pada masing-masing soal:

1. Soal No 1 sebagai soal yang paling banyak salah dijawab oleh mahasiswa. No 1 soal yang paling sulit bagi mahasiswa

2. Terdapat keseimbangan jawaban benar dan salah

3. Soal Nomor 3 sampai no 4 lebih banyak dijawab benar oleh mahasiswa

Gambar 1. Kurva Normal Masing-masing Soal

Secara keseluruhan masing-masing nomor soal telah dijawah oleh 10 mahasiswa dan memenuhi syarat kurva normal

Model Summary ANOVA Grafik Fungsi RelasiSoal No 1

Model Summary

R

R

Square

Adjusted R

Square

Std. Error of the

Estimate

.612 .375 .297 .433

The independent variable is Total.

ANOVA

Sum of

Squares df

Mean

Square F Sig.

Regression .900 1 .900 4.800 .060

Residual 1.500 8 .187

Total 2.400 9

The independent variable is Total.

Soal No 2

Model Summary

R

R

Square

Adjusted R

Square

Std. Error of the

Estimate

.667 .444 .375 .417

The independent variable is Total.

ANOVA

Sum of

Squaresdf

Mean

SquareF Sig.

Regression 1.111 1 1.111 6.400 .035

Residual 1.389 8 .174

Total 2.500 9

The independent variable is Total.

Soal No 3

Model Summary

R

R

Square

Adjusted R

Square

Std. Error of the

Estimate

.272 .074 -.042 .527

The independent variable is Total.

ANOVA

Sum of

Squares df

Mean

Square F Sig.

Regression .178 1 .178 .640 .447

Residual 2.222 8 .278

Total 2.400 9

The independent variable is Total.

Soal No 4

Model Summary

R

R

Square

Adjusted R

Square

Std. Error of the

Estimate

.068 .005 -.120 .546

The independent variable is Total.

ANOVA

Sum of

Squares df

Mean

Square F Sig.

Regression .011 1 .011 .037 .852

Residual 2.389 8 .299

Total 2.400 9

The independent variable is Total.

Soal No 5

Model Summary

R

R

Square

Adjusted R

Square

Std. Error of the

Estimate

.145 .021 -.101 .507

The independent variable is Total.

ANOVA

Sum of

Squares df

Mean

Square F Sig.

Regression .044 1 .044 .173 .688

Residual 2.056 8 .257

Total 2.100 9

The independent variable is Total.

B. Simpulan Butir soal Nomor 3 yang tidak valid, untuk kriteria penolakan H0, hipotesa nihil, pada taraf signifikansi sebesar 5% maupun 1 %.

SOAL NO 2A. Korelasi antara variable Komponen nilai dan korelasinya terhadap nilai akhir.

Tabel 1. Hasil Pengolahan Data dengan SPSS 17:Correlations

Jenis Test Pretest Sumtest UTS Sum_UTS Responsi Tgs_Klp Resp_TgsKlp U_Lisan UAS ULis_UAS Resp Nil_Akhir

Kode A B C D E F G H I J K L

Pretest Pearson Correlation 1 .291* .270* .326** .096 -.135 -.030 .149 -.018 .051 .096 .184

Sig. (2-tailed) .011 .019 .004 .415 .247 .799 .201 .880 .667 .415 .113

N 75 75 75 75 75 75 75 75 75 75 75 75

Sumtest Pearson Correlation .291* 1 .553** .931** .256* .184 .283** .115 .311** .315** .256* .704**

Sig. (2-tailed) .011 .000 .000 .018 .092 .009 .293 .004 .003 .018 .000

N 75 85 85 85 85 85 85 85 85 85 85 85

UTS Pearson Correlation .270* .553** 1 .852** .182 .217* .260* .201 .450** .469** .182 .741**

Sig. (2-tailed) .019 .000 .000 .095 .047 .016 .065 .000 .000 .095 .000

N 75 85 86 86 85 85 85 85 85 85 85 85

Sum_UTS Pearson Correlation .326** .931** .852** 1 .256* .221* .309** .167 .412** .422** .256* .809**

Sig. (2-tailed) .004 .000 .000 .018 .042 .004 .126 .000 .000 .018 .000

N 75 85 86 86 85 85 85 85 85 85 85 85

Responsi Pearson Correlation .096 .256* .182 .256* 1 .186 .743** -.009 .208 .177 1.000** .334**

Sig. (2-tailed) .415 .018 .095 .018 .088 .000 .936 .056 .105 .000 .002

N 75 85 85 85 85 85 85 85 85 85 85 85

Tgs_Klp Pearson Correlation -.135 .184 .217* .221* .186 1 .796** -.071 .183 .132 .186 .295**

Sig. (2-tailed) .247 .092 .047 .042 .088 .000 .518 .094 .229 .088 .006

N 75 85 85 85 85 85 85 85 85 85 85 85

Resp_TgsKlp Pearson Correlation -.030 .283** .260* .309** .743** .796** 1 -.054 .253* .199 .743** .407**

Sig. (2-tailed) .799 .009 .016 .004 .000 .000 .624 .020 .068 .000 .000

N 75 85 85 85 85 85 85 85 85 85 85 85

U_Lisan Pearson Correlation .149 .115 .201 .167 -.009 -.071 -.054 1 .146 .510** -.009 .396**

Sig. (2-tailed) .201 .293 .065 .126 .936 .518 .624 .183 .000 .936 .000

N 75 85 85 85 85 85 85 85 85 85 85 85

UAS Pearson Correlation -.018 .311** .450** .412** .208 .183 .253* .146 1 .925** .208 .818**

Sig. (2-tailed) .880 .004 .000 .000 .056 .094 .020 .183 .000 .056 .000

N 75 85 85 85 85 85 85 85 85 85 85 85

ULis_UAS Pearson Correlation .051 .315** .469** .422** .177 .132 .199 .510** .925** 1 .177 .863**

Sig. (2-tailed) .667 .003 .000 .000 .105 .229 .068 .000 .000 .105 .000

N 75 85 85 85 85 85 85 85 85 85 85 85

Resp Pearson Correlation .096 .256* .182 .256* 1.000** .186 .743** -.009 .208 .177 1 .334**

Sig. (2-tailed) .415 .018 .095 .018 .000 .088 .000 .936 .056 .105 .002

N 75 85 85 85 85 85 85 85 85 85 85 85

Nil_Aikhir Pearson Correlation .184 .704** .741** .809** .334** .295** .407** .396** .818** .863** .334** 1

Sig. (2-tailed) .113 .000 .000 .000 .002 .006 .000 .000 .000 .000 .002

N 75 85 85 85 85 85 85 85 85 85 85 85

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

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

Simpulan telah dijawab oleh ibu Helen