E. Population and Sample
In this research the writer takes a role as the researcher which is take the population at VII grade students SMPN 2 Tangsel. The quantity students
of seventh grade students SMPN 2 Tangsel Banten, are 400 students, namely class VII 1, VII 2, VII 3, VII 4, VII 5, VII 6, VII 8, VII 9, VII 10
which consist of 40 students every class. In This research, the writer takes sample of research is two classes, they are 80 students. The writer was taken
random aboutsample technique decide the sample. Class VII 6 which is employed 40 students as the experiment class and VII 5 which is employed
40 students as the control class. It will be taken only 20 students from each class. The writer collect the data by giving the students the same test 20
questions for both experiment class and control class.
F. The Technique of Collecting Data
One the important thing in this research is collecting data. To collect the data, the writer used the test. The test was done to know the
effectiveness of using TPR toward students’ imperative sentences mastery. It can determine the result of the research. In the experiment and control
class the writer gives the pre-test to the students both of two classes. While the post-test arranged to determine to growth of learning outcomes with two
methods used in this research. This some explain about the writer doing in collecting data:
1. Pre-test
The writer gave the pre-test to the students in the beginning of attending both experiment and control class. The test consist of 40
items multiple choices. This test used to know the students’ knowledge of the material which will be taught
2. Post-test
The writer gave the post-test to the students experiment class and control class in the end of lesson. The tests are similar with the test in
the beginning of pre-test, but the test was same consist of 40 items
multiple choices. There are 40 forty items in the test and the whole are multiple choices. If students answered a question correctly, they
would be given score 2.5 for complete sentences. So the score of students for the whole, if they answered are 100.
G. Technique of Analyzing the Data
Analyzing the Data is the last step in the procedure of experiment, in this case, processing the data. Data processing is the step to know the result
of both the experiment class and control class and also their differences. In analyzing the Data, the writer compares the score between pre-test
and post-test of bot the experiment class and control class to find out the differences score of student’s achievement in teaching imperative sentences
by using TPR. This research was analyzed by using T-test.
1
�� =
�1 −�
2
���
1
−�
2
M
1
= Mean of variable X M
2
= Mean of variable Y SE = Standard Error
The procedures of calculation were as follows. a.
Determining Mean of Variable X, with formula: M
1
=
X N
1
b. Determining Mean of Variable Y, with formula
M
2
=
Y N
2
c. Determining Standard of Deviation Score of Variable X, with formula:
SD
1
=
X
2
N
1 1
Anas Sudjono, Pengantar Statistik Pendidikan, Jakarta: Raja Grafindo Persada, 2002, p. 297.
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