15 50
65 15
16 40
70 30
17 38
60 22
18 50
60 10
19 40
66 26
20 72
73 1
21 30
72 42
22 35
70 35
23 74
76 2
24 31
64 33
25 63
67 4
26 40
67 27
27 30
56 26
28 32
70 38
29 40
67 27
30 35
74 39
31 35
60 25
32 31
68 37
33 30
63 33
34 30
63 33
TOTAL Ʃ γ 1= 1414
Ʃ γ 2= 2172 Ʃ γ= 758
Mean M
γ 1= 41.58823529 Mγ 2= 63.88235294 M
γ= 22.29411765
There are differences between the pre-test and the post-test score of controlled class. In the pre-test, the lowest score is 30, post-test is 50 and
gained score is 0. Besides, the highest score of pre-test is 74, post-test is 78, and gained score is 42. Then, the writer calculated the median score of
pre-test is 36.5, post-test is 64.5, and gained score is 36.5. For the mode score of pre-test is 30, post-test is 60, and gained score is 25. Meanwhile
the writer calculated the mean score of pre-test is 41.588, post-test is 63.882, and gained score is 22.29.
B. The Data Analysis
This part is intended to answer the research question “Whether
there is any influence of teaching descriptive writing by using think pair share technique?”. Here, the writer used SPSS to analysis the t-test score
both the experimental and the controlled class. The following table determines the t-test score of experimental and controlled class.
1. Pre-test Before the treatment, the writer conducted the pre-test for
experimental and controlled class. Both classes had the same characteristics such as background knowledge. In the pre-test the writer
determined the topic about “The idol” based on the syllabus and lesson
plan from that school. The mean score of pre-test in the experimental and controlled class can be seen below:
Table 4.3 The
t-test of pre-test in the experimental and controlled class
Mean Score t-test score
The experimental class The controlled class
M
x
= 43.26 M
y
= 41.58 t
o
= 5.07
The table 4.4 reports the t-test score of pre-test in the experimental and controlled class. There was a significant difference from measurement
score in the experimental and the controlled class Mx= 43.26, My= 41.58, SDx= 13.990, SDy= 13.255, t66= 5.07, p=00. It can be concluded that
the mean scores of experimental class is higher than the controlled class M
x
M
y
2. Post-test After the t-test of pre-test in the experimental and the controlled
class had been known, then in the following table, the writer reports the t- test of post-test in the experimental and the controlled class:
Table 4.4 The
t-test of post-test in the experimental and controlled class
Mean Score t-test score
The experimental class The controlled class
M
x
= 77.26 M
y
= 63.88 t
o
= 7.78
The table above informed that there was a significant difference from measurement post test score in the experimental and the controlled
class M
x
= 77.26, M
y
=63.88, SD
x
=6.712,, SDy= 7.450, t66= 7.782, p=0.00. It can be concluded that the mean of experimental class is higher
than controlled class M
x
M
y
. This means that the experiment in this study is succesfull.
The last, after getting the score of pre-test and post-test score both of the experimental and the controlled class, then the writer calculated the
gained score in both of them. The aim of gained score is to know whether there was a significant difference in the gain score between the
experimental and the controlled class. It also answers whether the alternative hypothesis Ha is accepted or rejected. In the following table,
the t-test calculation by using SPSS:
Table 4.5 Group Statistic
Group Statistics
Group N
Mean Std. Deviation Std. Error Mean
Gained EXP
34 34.00
13.983 2.398
CONTROL 34
22.29 12.189
2.090
Table 4.6 Independent Sample Test
Independent Samples Test
Levenes Test for Equality of
Variances t-test for Equality of Means
F Sig.
T Df
Sig. 2- tailed
Mean Difference
Std. Error Difference
95 Confidence Interval of the
Difference Lower
Upper Gained Equal variances
assumed .486
.488 3.680
66 .000
11.706 3.181
5.354 18.057
Equal variances not assumed
3.680 64.794 .000
11.706 3.181
5.352 18.060
The table by using SPSS above shows that there was a significant difference of the gain scores between the experimental class and the
controlled class. As written in the table for mean score of experimental class M
x
= 34.00 and the controlled class is M
y
= 22.29. Meanwhile, for standard of deviation score of experimental class is SD
x
= 13.983 and the controlled class is SD
y
= 12.186. From the result of gain mean score and standard deviation of
experimental and controlled class by using SPSS then the writer compared the data by using manual formula. The results by using SPSS and manual
formula are the same. The following table is the result of the comparison score of experimental and controlled class.
Table 4.8 The comparison score of experimental class and controlled class
Students X
Y X-MX
Y-MX X-MX
2
Y-MX
2
1 42
10 8
-12 64
144 2
19 1
-15 -21
225 441
3 44
6 10
-16 100
256 4
53 20
19 -2
361 4
5 47
18 13
-4 169
16 6
36 29
2 7
4 49
7 58
25 24
3 576
9 8
43 25
9 3
81 9
9 37
25 3
3 9
9 10
52 31
18 9
324 81
11 33
-1 -22
1 484
12 35
10 1
-12 1
144 13
40 28
6 6
36 36
14 52
25 18
3 324
9 15
44 15
10 -7
100 49
16 20
30 -14
8 196
64 17
4 22
-30 900
18 34
10 -12
144 19
37 26
3 4
9 16
20 22
1 -12
-21 144
441 21
27 42
-7 20
49 400
22 20
35 -14
13 196
169 23
20 2
-14 -20
196 400
24 6
33 -28
11 784
121 25
6 4
-28 -18
784 324
26 22
27 -12
5 144
25 27
29 26
-5 4
25 16
