levels of measurement

• nominal data- categorical data, the frequency count of a particular variable is recorded at this level of measurement, these variables are discrete (they don't overlap), and the categories have no natural order.
• when using nominal data other than frequency, psychologists can't discuss differences between each category, examples of nominal data- birth country, career choice, and taste in music
• ordinal data- same properties as nominal data, (also a form of categorical data); however, the categories have a natural order. The difference between each point in ordinal scale is not consistent.
• examples of ordinal data- include positions in a competition 1st 2nd 3rd, choice on a likert scale