Question

Classify each of the following variables as either measurable (continuous) or categorical. If a variable is categorical, indicate whether it is nominal or ordinal. Justify your answer. (Note: No marks will be given without justifications.) a. The level of impurity in water (measured in milligrams per liter). b. The various political parties in Singapore. c. The education level of employees of a certain company. (2 marks) (2 marks) (2 marks) d. 5-point Likert scale used in surveys. The 5 points are described as ‘Strongly Disagree’, ‘Disagree’, ‘Neither agree or disagree’, ‘Agree’ and ‘Strongly Agree’.

Answer 1

a. The level of impurity in water = Continuous (since it measured in milligram per liter) b. The various political parties in Singapore = nominal (Since it is not possible to order the categories) c. The education level of employees of a certain company Ordinal since the order of categories are: Class 10, Class 12, Graduation, Post graduation etc.) d. 5- point scale used in surveys Ordinal (since the order of categories are: Strongly Disagree, Disagree, Neither agree or disagree, Agree and Strongly Agree)