Difference between qualitative and quantitative data.

• Explain the difference between qualitative and quantitative data. • Define the four levels of measurement (nominal, ordinal, ratio, interval) and note whether each level is qualitative or quantitative in nature. Provide an example of each level of measurement not included in the textbook. • Why are levels of measurement important to the research process? • Discuss dependent variables, independent variables, and confounding variables, and how they are used in the research process.