Concepts such as multi-stage sampling, stratification and weighting among others are used to achieve a representative sample (Agresti, 2000).
The research questions should aim to explain a trend or trait in the population that is of interest to policy makers, the general population or any other interest groups. Depending on the end user of the information, different covariates may be collected either at baseline or at intervals to best describe the phenomenon under investigation ( Babbie, 2010).
Regarding the first research question, there has been growing concern on the need to take care of the environment. Environmental degradation is on the rise and the impact of uncontrolled activities that negatively impacts on the environment are quite evident. Global warming has become a keyword in any talks, conferences, workshops or other forums where environmental matters are being discussed.
Nations across the world are grappling with challenges resulting from environmental degradation. Issues such as air and water pollution, flooding, siltation of water bodies, deforestation, persistent droughts and a lot more have brought focus on the respective governments’ commitment towards preserving the environment.
Being the major policy maker and regulatory authority, the government has the capability to implement policies that would preserve and protect the environment from further degradation. For instance, by the government licensing and subsidizing the adoption of green energy sources, offering carbon credits to industries that significantly cut down on their carbon emission and enforcing stringent laws against those found polluting the environment; this would go a long way towards protecting the environment.
In so doing however, questions arise as to how far the government should go in its quest to preserve the environment especially if this would result in the government curtailing the citizen’s freedom to