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CHAPTER III METHODS OF INVESTIGATION
In the third chapter, the writer presents the population, sample and sampling technique, identification of the problems, techniques of data collection and
technique of data analysis. In this research, the writer used two kinds of methods in order to get data required in this study, namely library research and analysis of
students’ works.
3.1 Population
The population on this study is eighth grade students of Junior High School in the first semester, which covers three classes each of them consists of forty
students. Therefore the total number of the population is one hundred and twenty.
3.2 Sample and Sampling Technique
To make the study effective, the writer selects some sample. The writer will take three classes on the school that consists of forty students. So, the total
samples are one hundred and twenty students. In this study, the writer will use the random sampling technique to take sample.
According to Brink 1974:33 random sampling refers to the process of drawing a random sample of individuals of some population. The writer
administers a simple random sampling by take three classes on a school and takes the students’ answer sheets to be analyzed.
3.3 Identification of the Problem
Most of the teacher of Junior and Senior High Schools still do not know how to construct a good test. They made a test without paying attention to the
characteristic or the quality of a good test. There are four problems related to the teacher-made English test items. The
problems are: a. The validity level
b. The reliability level c. The difficulty level
d. The discrimination power
3.4 Technique of Data Collection
In this study the intended test is the mid-term test of eighth grade students of Junior High School. The data are in the form of students’ answer sheets, and the
test item of mid-term test of eighth grade students of Junior High School. The writer selects the eighth grade students of Junior High School to get the required
data. Before the test administrated to the students, the writer will contact the English teacher of the selected school to ensure that they were not used anymore.
Then, she begins to analyze the test.
3.5 Technique of Data Analysis
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