QUESTION 1 For each of the following research questions. list all the variables that are needed to answer the question. as well as the measuring scales of the variables. (a) Are unmarried adults more likely to own sports care than married adults? (b) Do rural households spend more money on transport per year than urban households? (o) Is there a correlation between being diagnosed with diabetes and being diagnosed with high blood pressure? [15] QUESTION 2 Identity the unit of analysis (that is. what kind of entity is being researched} and the population (that Is. what particular group of entities forms the entire population) for each of the following research projects. (a) A survey to nd out which percentage of households In Johannesburg collects rainwater. (b) An investigation into whether more accidents happen in Johannesburg on rainy days titan on days without rain. (c) A research project which aims to nd out lights are more likely to drop out of high school than boys. (d) An Investigation Into the average length of action movies. [20] QUESTION 4 (a) Explain what ls meant by an Index variable and give an example of an Index variable (other than those given in the study guide}. (b) Give one reason why a researcher may wish to ask for the age group of a respondent rather than for their age In full years. (c) Give an example of a research question where It is important to measure age as a ratio 2 variable rather than as an ordinal variable. Justify your answer! [20] STA'I 501.41% QUESTION 3 Classify each of the following data collection methods as direct observation. experiment, or survey. Justify your answers! (a) A researcher collects data from working mothers of small children to nd out how their childcare arrangements vary based on where the mothers live. Data is collected with a questionnaire with questions about the type of childcare anangement and the type of settlement the mothers live in. (b) A researcher asks participants for their height and weight. in order to nd out whether there is a relationship between the two. to) An astronomlst rrteasures the brightness of a star at 1-week intervals to find out whether it Is a variable star. [15] QUESTION 4 Which of the following statements are true and which are false? Justify your answers! (a) A quantitative research project cannot involve collecting qualitative data. (b) Primary data is always better than secondary data. (c) The Likert scale is an example of ordinal measurement scale. (d) When coding a questionnaire question where the responded is asked to tick all choices that apply to hirnlher. each such choice needs to be coded as a separate variable. [20]