G. The Hypothesis of the research
The hypotheses of research can be formulated as follows: a. Verbal hypothesis
1. Null Hypothesis H
o
There is no significant progress in using numbered heads together
technique in improving students’ reading ability in descriptive text at the second grade of SMPN 2 Tangerang
Selatan. 2. Alternative Hypothesis H
a
There is a significant progress in using numbered heads technique in improving
students’ reading ability in descriptive text at the second grade of SMPN 2 Tangerang Selatan.
b. Statistical hypotheses H
o
: p = q H
a
: p = q
26
CHAPTER IV RESEARCH FINDINGS
A. Data Descriptions
As the researcher explained in the previous chapter, she took the data by using reading test about descriptive text. After conducting the research, she
obtained two kinds of data, the score of pre –test and post–test from both
experimental and controlled class are described in the following table:
Table 4.1 Students’ score of VIII.1 experimental class
Students Pretest
X
1
Postest X
2
Gained score X
1 60
65 5
2 70
80 10
3 65
70 5
4 50
60 10
5 45
70 25
6 45
60 15
7 70
80 10
8 45
50 5
9 50
70 20
10 45
70 25
11 40
50 10
12 50
75 25
13 55
70 15
14 65
70 5
15 45
60 15
16 75
90 15
17 50
55 5
18 40
60 20
19 40
45 5
20 40
70 30
Students Pretest
X
1
Posttest X
2
Gained Score X
21 55
80 25
22 55
80 25
23 60
75 15
24 50
50 25
65 75
10 26
60 80
20 27
45 75
30 28
80 80
29 60
75 15
30 65
80 15
31 60
65 5
32 45
55 10
33 55
65 10
34 60
65 5
35 55
65 10
36 40
75 35
37 60
65 5
38 65
70 5
39 55
70 15
N = 39 ∑X
1
=2135 Mean:
213539 = 54.74
∑X
2
=2665 Mean:
266539 = 68.33
∑X = 530 Mean:
53039 = 13.58
1. Statistical Data of Pretest of Experimental Class Range: H
– L 80
– 40 = 40 Class
= 1 + 3.3 log n = 1 + 3.3 log 39
= 1 + 3.3 1.59 = 6.25 = 6 Interval = R = 40 = 6.66 = 7
K 6
Table 4.2 Frequency of Pretest of Experimental class
Interval score Frequency
Percentage 40
– 46 12
30 47
– 53 5
12 54
– 60 13
33 61
– 67 5
12 68
– 74 2
5 75
– 81 2
5 N= 39
2. Statistical Data of Posttest of Experimental Class Range: H
– L 90
– 45 = 45 Class
= 1 + 3.3 log n = 1 + 3.3 log 39
= 1 + 3.3 1.59 = 6.25 = 6 Interval = R = 45 = 7.5 dibulatkan 8
K 6
Table 4.3 Frequency of Posttest of Experimental class
Interval score Frequency
Percentage 45
– 52 4
10 53
– 60 6
15 61
– 68 6
15 69
– 76 15
38 77
– 84 7
17 85
– 92 1
2 N = 39
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