How did the recent global financial crisis change the world’s economic landscape? What are the repercussions of current economic and political policies on the future societal development, as quantified through indicators such as the unemployment rate, average household income, consumer confidence index? To answer such questions, policy makers have to collect information from the population and summarize it in a meaningful way. This is where survey organizations and statistical bureaus play a crucial role. Collecting information from the entire population requires significant amounts of time and money. Alternatively, a sample survey may be conducted, where only a sample from the specified population is requested to provide information. Using the results from the survey sample, knowledge can be obtained about th population of interest.