e-Journal of English Language Teaching Society ELTS Vol. 2 No. 1 2014 – ISSN 2331-1841
Page 8
Table 2: The Deviation and The Square Deviation of Pretest and Posttest of The Control Group
No Name
Pretest Y
1
Posttest Y
2
Y
2
-Y
1
Y
2
Raw score Standard score Raw score Standard score Y
1 AS
2 1
8 4
3 9
2 AD
6 3
7 3.5
0.5 0.25
3 LG
9 4.5
13 6.5
2 4
4 MF
6 3
10 5
2 4
5 MH
6 3
8 4
1 1
6 MN
8 4
10 5
1 1
7 SA
7 3.5
8 4
0.5 0.25
8 AA
4 2
9 4.5
2.5 6.25
9 AR
4 2
11 5.5
3.5 12.25
10 BS
10 5
9 4.5
-0.5 0.25
11 DG
3 1.5
12 6
4.5 20.25
12 DF
6 3
16 8
5 25
13 EK
5 2.5
14 7
4.5 20.25
14 IM
5 2.5
13 6.5
4 16
15 IF
7 3.5
9 4.5
1 1
16 NA
4 2
9 4.5
2.5 6.25
17 NB
6 3
12 6
3 9
18 MB
6 3
12 6
3 9
19 RA
7 3.5
10 5
1.5 2.25
20 SL
7 3.5
9 4.5
1 1
21 SG
8 4
11 5.5
1.5 2.25
22 YK
5 2.5
11 5.5
3 9
23 WW
7 3.5
11 5.5
2 2
24 WP
7 3.5
16 8
4.5 20.25
25 MA
8 4
8 4
Total 153
76.5 266
133 56.5
181.75
Next, the pretest in experimental group was conducted on November 11
th
2013. After getting the total standard score of the students, the students’ mean score of the experimental
group in the pretest was computed. To gather the mean score, the sum of the students’ standard
score 81.5 was divided by the total number of the students 27. In the result the mean score of the experimental group in pretest was 3.01.
Then, the posttest in experimental group was conducted on December 3
rd
2013. By applying the same formula, the mean score of the experimental group in posttest was gathered.
The sum of students’ standard score 191 was divided by the total number of the students 27. Therefore, the mean score of the experimental group in posttest was 7.07.
e-Journal of English Language Teaching Society ELTS Vol. 2 No. 1 2014 – ISSN 2331-1841
Page 9
Furthermore, the deviation and the square deviation of the experimental group were calculated in this research. After getting the deviation and the square deviation of the
experimental group, then the mean deviation of experimental group was computed. To gather the mean deviation of the experimental group, the sum of deviation score 109.5 was divided
by the total number of the students 27. Thus, the mean deviation of experimental group was
4.05 .
After that, the sum of squared deviation in experimental group was calculated. After calculated the sum of squared deviation around the mean deviation score of the experimental
group, it was found that the sum of squared deviation in experimental group was 11.17. The
result of pretest standard score, posttest standard score, deviation, and the square deviation of experimental group was displayed in Table 3.
e-Journal of English Language Teaching Society ELTS Vol. 2 No. 1 2014 – ISSN 2331-1841
Page 10
Table 3: The Deviation and The Square Deviation of Pretest and Posttest of The Experimental Group
No Name
Pretest X
1
Posttest X
2
X
2
-X
1
X
2
Raw score Standard score Raw score
Standard Score X
1 AA
5 2.5
17 8.5
6 12
2 AG
10 5
17 8.5
3.5 12.25
3 AW
6 3
14 7
4 16
4 DZ
9 4.5
15 7.5
3 9
5 HS
8 4
17 8.5
4.5 20.25
6 IS
7 3.5
17 8.5
5 25
7 JA
3 1.5
12 6
4.5 20.25
8 KH
6 3
16 8
5 25
9 FA
4 2
12 6
4 16
10 FP
7 3.5
12 6
2.5 6.25
11 FS
2 1
15 7.5
6.5 42.25
12 MG
8 4
16 8
4 16
13 MI
8 4
15 7.5
3.5 12.25
14 MR
2 1
12 6
5 25
15 MA
10 5
16 8
3 9
16 NL
4 2
17 8.5
6.5 42.25
17 NS
5 2.5
8 4
1.5 2.25
18 RW
6 3
13 6.5
3.5 12.25
19 RD
9 4.5
17 8.5
4 16
20 RS
4 2
12 6
4 16
21 RA
4 2
12 6
4 16
22 RM
5 2.5
15 7.5
5 25
23 TF
7 3.5
13 6.5
3 9
24 YR
3 1.5
11 5.5
4 16
25 YM
6 3
12 6
3 9
26 YN
6 3
12 6
3 9
27 PN
9 4.5
17 8.5
4 16
Total 163
81.5 382
