phase: what factors effect on happiness ranking of states?

My research question: what factors effect on happiness ranking of states?

Reasons: 1) Healthy Life Expectancy, the longer lives making the higher happiness ranking of states.

2) Medical income: the medical Insurance and medical facilities are both important factors for happiness rank

3) Unemployment rate; the lowest unemployment rate will affect the happiness rank.

4) The pressure of working; whether people love their job or not, the requirement of education level for the job. The lowest pressure of working will making the higher happiness ranking of states.

please get the your ideas and the examples base on the topic. there are two sample documents for show details for each steps. let me know if you have any questions.