= 5.2 = 5 I= R = 30 = 6
K 5 NO
F Lower
Limit Higher
Limit Xi
f.Xi
1 65 – 70
3 64.5
70.5 67.5
202.5 2
71 – 76 3
70.5 76.5
73.5 220.5
3 77 – 82
3 77.5
82.5 79.5
238.5 4
83 – 88 4
82.5 88.5
85.5 342
5 89 – 94
7 87.5
94.5 91.5
640.5
20 1744
Mean = = 1744 = 87.2
n 20 Median=
ℓ + ½n - fkb Fi
= 87.2 + 10 – 7 6
= 87.2+ 3 6
= 87.2 + 0.5 = 87.7
Modus =
ℓ + S1__ i
S1 + S2 = 87.2 + _4 6
4 + 0 = 87+ 24 6
4 = 87.2 + 4
= 93.2
Table 3.2 The Students’ Pre-test and Post-test Scores of Control Class
Whole-class Teaching
Students X Pre Test Score
Post Test Score Gained d
score post test-pre-
test
1 75
85 10
2 65
80 15
3 80
80 4
75 80
5 5
80 85
5 6
70 70
7 65
80 15
8 50
70 20
9 50
75 25
10 65
75 10
11 70
80 10
12 70
85 15
13 75
75 14
70 75
5 15
75 80
5 16
60 75
15 17
45 50
5 18
40 55
15 19
55 85
30 20
75 85
5
1310 1525
210
Mean 65.55
76.25 10.5
The table 2 describes that the lowest gained score in the post-test and pre-test is 0 and the highest score is 30. Therefore, it can be
summarized that the lowest and highest gained scores in post-test is higher than pre-test scores.
Ratio Scale Interval
50, 55, 70, 70, 75, 75, 75, 75, 75, 80, 80, 80, 80, 80, 80, 85, 85, 85, 85, 85. R= 85 – 50 = 35
K= 1 + 3.3 logn = 1 + 4.2
= 5.2 = 6 dibulatkan ke atas I= R = 35 = 5.8 = 6
K 6 NO
F Lower
Limit Higher
Limit Xi
f.Xi
1 50 – 55
2 49.5
55.5 52.5
105 2
56 – 61 55.5
61.5 58.5
3 62 – 67
61.5 67.5
64.5 4
68 – 73 2
67.5 73.5
70.5 141
5 74 – 79
5 73.5
79.5 76.5
382.5 6
80 – 85 11
79.5 85.5
82.5 907.5
20 1536
Mean = = 1536 = 76.8
n 20 Median =
ℓ + ½n - fkb Fi
= 79.5 + 10 – 0 11
= 79.5 + 10 = 79.5 + 0.9 = 80.4
11 Modus =
ℓ + S1__ i
S1 + S2 = 79.5 + _6 6
6 + 0
= 79.5 + 6 6 6
= 79.5 + 6 = 85.5 2.
The Analysis of Data
Before the writer analyzed the data, the writer has calculated the data into the statistic calculation. The writer used
formula to find the empirical evidence statistically and to make the testing of the hypotheses.
So this research will be easier. Prior the calculation of
, the writer made the calculation table to gain Mean and Deviation Standard from two variables, the table as
follows:
Table 3.3 The Comparison Scores of Each Student in Experiment Class and Control
Class Students
X Students
Y X
Y X
Y x.x
y.y
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