Chapter III
RESEARCH METHODOLOGY
This chapter explains the research design used, subjects of the study and sampling scheme, data gathering procedures, and the statistical treatment.

Research Design This study made use of a descriptive research design using a survey questionnaire checklist in order to gather data on the problems encountered of tricycle drivers in Dagupan City. A descriptive method in research is concerned with data description and its characteristics about a population. Its goal is to acquire factual, accurate and systematic data that can be used in averages, frequencies and other similar statistical calculations. Descriptive studies do not quite involve experimentation, as they are more concerned with naturally occurring phenomena than with the observation of controlled situations (Valdez, 2010).

Sources of Data The respondents of this study were those member of respective TODA, colorum, or seasonal Tricycle Drivers. Systematic sampling was used in selecting the sample respondents. It is a strategy for selecting the members of a sample that allows only chance and a system to determine membership in a sample (Mercado-Del Rosario, 2010). To determine the sample interval, population size is divided by the sample size desired which is computed using Slovins formula. n =
N

1 + N(e)2

Where: n = sample size
N = population size e = margin of error desired (.05)

Data Gathering Procedure The researcher also used a survey questionnaire. The questionnaire is a data gathering device consisting of a well-planned, written questions related to a certain topic, with spaces provided by for responses to each question given out to obtain needed data/information (Mercado-Del Rosario, 2010).
The researcher prepared a questionnaire for them to answer the main problem and sub-problems of this research. The questions were developed based on the studies, articles and website information gathered and also the things related to effects of sanitation.