The World Values Survey is a global research project that explores people's values and beliefs and how they change over time. The data we need to analysis includes the following information: gender, age, marital status, educational attainment, work status, feeling of happiness and level of life satisfaction of respondents who have participated in the surveys. For the variable life satisfaction, the answers are coded to a 10-point Likert scale where "1" means dissatisfied and "10" means satisfied.

You are consulted to investigate the life satisfaction of Singaporeans in the recent decade or more specifically, whether Singaporeans have become more or less satisfied with their life and what the reasons and consequences of the changes are.

If you have a free hand to study this research question starting from data collection to analysis, demonstrate how you would conduct the project.