Place and Time of Research Method of Research Technique of Data Collecting
12 65
77.5 12.5
13 80
90 10
14 92.5
97.5 5
15 82.5
77.5 -5
16 92.5
90 -2.5
17 85
92.5 7.5
18 85
90 5
19 75
80 5
20 90
95 5
21 75
72.5 -2.5
22 90
97.5 7.5
23 70
82.5 12.5
24 62.5
62.5 25
80 77.5
-2.5 26
72.5 67.5
-5 27
85 82.5
-2.5 28
72.5 75
2.5 29
72.5 62.5
-10 30
75 70
-5 31
57.5 70
12.5 Σ
2397.5 2482.5
85 Mean
77.33870968 80.08064516
2.741935484
Table 4.1 above describes the lowest score in the post-test is as same as score in the pre-test, it is 57.5. The highest score in the post-test is higher than
in the pre-test, it is 97.5. To know more detail about frequency distribution of experiment class
students, the data can be seen on the table of class interval below:
a. Pre-Test of Experiment Class Range Pre-test of experiment class
= H – L
= 92.5 – 57.5
= 35 Class
= 1 + 3.3 log n = 1 + 3.3 log 31
= 5.92 Interval Pre-Test
= R C = 35 5.92
= 5.9 = 6
Percentage P = x 100
Explanation: H : Highest Score
L : Lowest Score R : Range of the score
F : Frequency of the score N : Number of Students
Table 4.1.a Frequency Distribution of Experiment Class Pre-Test
No. Class Interval
Frequency Percentage
1 57.5 - 62.5
5 16.12
2 63.5 - 68.5
1 3.22
3 69.5 - 74.5
6 19.35
4 75.5 - 80.5
7 22.58
5 81.5 - 86.5
5 16.12
6 87.5 - 92.5
7 22.58
Σf 31
100
From the table above, 22.58 students got score about 75.5 - 80.5 and 87.5 - 92.5 with the frequency 7 students, 3.22 student got score about 63.5
– 68.5, 16.12 students got score 57.5
– 62.5, and only 16.12 students got score about 81.5
– 86.5 and 19.35 students got score about 69.5 – 74.5.
Data frequency distribution can be described on the chart below :
1 2
3 4
5 6
7
57.5 - 62.5 63.5 - 68.5
69.5 - 74.5 75.5 - 80.5
81.5 - 86.5 87.5 - 92.5
Diagram 4.1.a Frequency Distribution of Experiment Class Pretest
b. Post-Test of Experiment Class Range Post-test of experiment class
= H – L
= 97.5 – 57.5
= 40 Class
= 1 + 3.3 log n = 1 + 3.3 log 31
= 5.92 Interval Post-Test
= R C = 40 5.92
= 6.75 = 7
Percentage P = x 100
Table 4.1.b Frequency Distribution of Experiment Class Post-Test
No. Class
Interval Frequency
Percentage 1
57.5 - 63.5 4
12.90 2
64.5 - 70.5 5
16.12 3
71.5 - 77.5 6
19.35 4
78.5 - 84.5 3
9.67 5
85.5 - 91.5 7
22.58 6
92.5 - 98.5 6
19.35 Σf
31 100