Notes: = reliability coefficient for the whole item
= reliability coefficient for half of the test items
From the calculation above, the result of the reliability index of the whole test was 0,75. It was categorized as reliable because according to Sudijono 1998:209
the reliability coeffici ent of teacher made test is ≥ 0,70. It means that the researcher
did not need to make any changes of the test items, and the test items for the posttest could be administered.
4.5 The Result of the Primary Data
The result of the primary data was collected by using a reading comprehension test as posttest’s result. It was administered to obtain the data about the significant
difference between the experimental and the control groups. The result of the reading comprehension test was analyzed in the following part.
4.5.1 The Result of Posttest
The posttest was administered to both of groups, the control group and the experimental group on Thursday, January 29, 2015 and Tuesday, February 3, 2015.
The control group was given pot test from 08:45 until 09:45 a.m. while the experimental group was tested from 08.45 until 09.45 a.m. The posttest was
administered after the two meetings of NHT treatment for the experimental group and two meetings of Lecturing technique and Question
– Answer technique for the control group in learning reading comprehension. The meetings were done from
Tuesday, January 20, 2015 up to Tuesday, January 27, 2015. The total number of the test takers of the experimental group was 43 students, while the test taker of the
control group was 44 students. The posttest used was a reading comprehension test consisting of 25 test items in the form of multiple choices with four options, which
was administered in 60 minutes. The correct answer was scored 4 and the total score of the answers from the test was 100. The result of the posttest was analyzed by using
independent sample t-test formula to know whether or not the mean difference between the experimental group and the control group was significant. Then, it was
consulted to the t-table significant level of 5. The result of the posttest calculation could be seen in the following table.
Table 3. The Tabulation of Student’s Reading Post Test Scores
No. Experimental Group
Control Group X
X2 Y
Y2
1 72
5184 64
4096 2
80 6400
76 5776
3 80
6400 72
5184 4
72 5184
56 3136
5 76
5776 76
5776 6
52 2704
68 4624
7 76
5776 76
5776 8
80 6400
80 6400
9 56
3136 32
1024 10
68 4624
68 4624
11 76
5776 68
4624 12
88 7744
68 4624
13 76
5776 64
4096 14
52 2704
64 4096
15 88
7744 68
4624 16
84 7056
72 5184
17 72
5184 68
4624 18
76 5776
52 2704
19 84
7056 64
4096 20
52 2704
60 3600
21 76
5776 48
2304 22
60 3600
76 5776
23 68
4624 64
4096 24
72 5184
52 2704
25 64
4096 56
3136 26
72 5184
52 2704
27 68
4624 52
2704 28
- -
36 1296
29 64
4096 52
2704 30
80 6400
56 3136
31 76
5776 52
2704 32
76 5776
48 2304
33 72
5184 72
5184 34
80 6400
64 4096
35 76
5776 60
3600 36
92 8464
52 2704
37 80
6400 60
3600 38
60 3600
52 2704
39 76
5776 56
3136 40
60 3600
56 3136
41 60
3600 56
3136 42
72 5184
64 4096
43 80
6400 72
5184 44
80 6400
60 3600
∑ 3124
231024 2682
168432 Mean
72.65 60.95
Notes: X
: The students’ reading scores of experimental group Y
: The students’ reading scores of control group From the post-test scores calculation the computation of the t-
test on students’ reading achievement scores were as follows.
1. Calculating the mean score of the experimental group
65 ,
72 43
3124
Nx X
Mx 2.
Calculating the mean score of the control group
95 ,
60 44
2682
Ny Y
My
3. Calculating the individual score deviation square of Mx
Nx X
x x
2 2
2
43 3124
231024
2
= 231024 – 226962,23
= 4061,77 4.
Calculating the individual score deviation square of My
Ny Y
y y
2 2
2
44 2682
168432
2
= 168432 – 163480,09
= 4951,91
5. Calculating the t-test of reading achievement
Ny Nx
Ny Nx
Y X
My Mx
t
test
1 1
2
2 2
44 1
43 1
2 44
43 91
, 4951
77 ,
4061 95
, 60
65 ,
72
045 ,
04 ,
106 7
, 11
18 ,
2 7
, 11
= 5,3669725 = 5,37
6. Calculating the degree of freedom
D
f
= Nx+Ny-2 = 43+44-2
= 85 Based on the computation of the t-test formula of the scores of the post test,
it showed that the statistical value of t-test was 5,37. Then t-table at significance level of 5 with degree of freedom D
f
85 was 1,98. It means that the statistical value of t-test was higher than t-table 5,37 1,98.
4.5.2 The Hypothesis Verification
The result of the data analysis showed that the statistical value of students’ posttest was 5,37 while the value of t-table at significant level 5 with degree of
freedom D
f
85 was 1,98. It indicates that the value of t-test was higher than that of t- table 5,37 1,98. It meant that the null hypothesis H
o
formulated: “NHT technique does not have any significant effect on the eighth grade students’ reading
comprehension achievement at SMP Islam Gumukmas in the 20142015 academic year” was rejected. In contrast, the formulated alternate hypothesis H
a
: NHT technique has any significant effect on the eighth grade students’ reading
comprehension achievement at SMP Islam Gumukmas in the 20142015 academic year” was accepted. It indicated that the result of t-test analysis was significant.
Implementation of NHT was significantly performed by the students on reading comprehension achievement. From the posttest score, it could be seen that the
experimental group who got NHT Treatment in learning reading comprehension got better score compared to the control group who was taught by using Lecturing
technique and Question – Answer technique, followed by giving exercise only.
Therefore, NHT technique has affective significantly of the students on reading comprehension achievement.
4.6 The Discussion
