Step 4: How to Choose a Particular Method to Collect Data for the Math SBA



In this section you must write a detailed description that states exactly how and where the data for a project was collected. It is important to remember that the research is seeking to answer a problem that the student has identified. Hence, in order to help the student to answer the research problem, data must be carefully collected and studied.

Data can be collected in a number of different ways. The particular method chosen for data collection will vary and depends on what type of data the student is looking for. The following are a few different methods that can be used to collect data:

(a) THE QUESTIONNAIRE In this method, the student gives the respondents written questions on a question sheet. The questions are standardized which means that all the respondents must answer the same set of questions. This method is an inexpensive way to collect data from a large number of persons. It also allows for collecting data easily without revealing the respondent’s identity.

However, some disadvantages of using questionnaires are: • Respondents are sometimes not motivated to answer all the questions. • If some responses are confusing, they are usually difficult to clarify. • Sometimes questionnaires are not returned on time.

(b) PERSONAL INTERVIEWS Here, the student can structure some questions that he or she wants to be answered. The student can then question respondents and record the answers on a sheet. In this method, the student has the flexibility to probe the respondents in order to clarify answers and ask follow up questions.
However, since the student is face to face with the respondent, this may cause discomfort to the respondent and he or she may not answer truthfully. In addition, the personal nature of the interview may cause the student to ask subjective questions that could lead the respondent in a particular direction.

(c) OBSERVATION Without conducting interviews the student can integrate into a population and quietly record data on it. This data can then be studied in order to make inferences about the population. Note, that in this method of data collection, the student will have no control over the group that is going to be observed.

(d) EXAMINATION OF RECORDS The student can seek permission to peruse records, reports, statements and regulations in order to collect data on a particular group. However, the disadvantages of this method are: • It can take a long time to sort and collect data from reports and records. • The student may not understand the data from the records and arrive at faulty conclusions.

VARIABLES Remember, that a research investigates the relationship between variables. A variable is any factor that has a quantity or quality that can change.

For example: • A dependant variable is a variable that can change based on the impact of another variable. • An independent variable is a variable that affects a dependant variable which can cause it to contribute to a problem.

For example, in this sample project: Service at the cafeteria is an independent variable that can impact on the waiting time for the service. Waiting time is the dependant variable. When collecting data for a project it is good practice to identify the different types of variables.

For example, in this sample project the method of data collection could read as follows:

The method of data collection chosen was personal interviews.

“A form class was selected from each year group from Forms 1 to 5. The names of all the students from each class were placed into five (5) separate boxes. Each box was shaken and then the names of twenty (20) students were randomly selected from each box. This created a sample size of one hundred (100) students for the purpose of the research.”

The one hundred (100) students were then each asked the standardized question: “How long did you spend waiting in line for service at the school’s cafeteria during the lunch break?”

The data was collected from Monday to Friday, over a one week period. Permission to survey the students during the period immediately after the lunch break was granted by my teacher.

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