Students Pre-Test
Post-Test Gain Score
23 47
53 6
Ʃ n = 23 Ʃ X
=1359 Ʃ X
1
=1524 Ʃ X
2
=165 AVERAGE
59 66.26
7.17 MAX
87 87
MIN 37
40
From the description of score in controlled class above, it could be seen that from 23 students in the class, the mean of pre-test was 59 and the mean of post-test
was 66.26. The writer got the mean of gain score was 7.17. The smallest score in the pre-test was 37 by one student and the highest score was 87 by one student. After the
writer giving the treatment without using picture series, the writer gave the students post-test. The data showed in post-test that the smallest score was 23 by one students
and the highest score was 87 by one student. From the differences of table 4.1 and 4.2 above it, it can be concluded that there was positive effect in teaching reading
comprehension of narrative text through picture series.
Table 4.3 The Comparison between the Experiment Class and Controlled Class
students Experiment
Class X Controlled
Class Y x
X-MX y
X-MY x
2
y
2
1 7
6 -12.35
-1.17 152.52
1.37 2
30 3
10.65 -4.17
113.42 17.39
3 6
10 -13.35
2.83 178.22
8.01 4
24 7
4.65 -0.17
21.62 0.03
5 10
20 -9.35
12.83 87.42
164.61 6
30 16
10.65 8.83
113.42 77.97
7 10
3 -9.35
-4.17 87.42
17.39 8
20 -4
0.65 -11.17
0.42 124.77
9 10
-9.35 -7.17
87.42 51.41
10 13
6 -6.35
-1.17 40.32
1.37
students Experiment
Class X Controlled
Class Y x
X-MX y
X-MY x
2
y
2
11 20
13 0.65
5.83 0.42
33.99 12
27 13
7.65 5.83
58.52 33.99
13 10
10 -9.35
2.83 87.42
8.01 14
27 7
7.65 -0.17
58.52 0.03
15 10
-9.35 -7.17
87.42 51.41
16 17
10 -2.35
2.83 5.52
8.01 17
10 3
-9.35 -4.17
87.42 17.39
18 47
10 27.65
2.83 764.52
8.01 19
14 13
-5.35 5.83
28.62 33.99
20 23
10 3.65
2.83 13.32
8.01 21
36 6
16.65 -1.17
277.22 1.37
22 17
-3 -2.35
-10.17 5.52
103.43 23
27 6
7.65 -1.17
58.52 1.37
Ʃ X=19.35 Ʃ Y=7.17 Ʃ x= -0.05 Ʃ y=0.09 Ʃ
x
2
=2415. 16
Ʃ y
2
=773 .33
X = Gained score of the experimental class Y = Gained score of the control class
x = The different value of X after compared with the mean of gained score of the experimental class
y = The different value of Y after compared with the mean of gainedscore of the control class
x
2
= The square value compared to the mean of gained score of experimental class
y
2
= The square value compared to the mean of gained score of control class
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