Income can have significant effect on people's spending patterns. Research studies have revealed that consumer expenditure is influenced by various factors such as their income, gender, age and level of education. In order to investigate the relationship between food expenditure and take home pay in Australia, a researcher plans to survey a sample of individuals across the country.
(a) What type of survey method the researcher could use and why?
(b) What sampling method could the researcher use to select his/her sample and why?
(c) What are the two main variables the researcher should consider collecting data for the purpose of the above analysis and why? Identify the data type(s) for the variables.
(d) What kind of issues the researcher may face in this data collection?