types of scales

• What types of scales are existing?

  Qualitative and Quantitative
• What is the main characteristics for qualitative type of scale?

  Can't be used for mathematical operations
• What is the main characteristics for quantitative type of scale?

  Can be used for mathematical operations
• Types of scales within qualitative type?

  Nominal and ordinal
• To what we can split quantitative type?

  Interval (discrete) scales and Ratio (continuous) scales
• Types of scales according to SPSS classification?

  Scale, nominal, and ordinal
• What is the main point for nominal scale?

  We can tell only if some things of a such type are same or not
• What is the main thing about ordinal scale?

  That we can rank variables of a such type according to some criteria
• What is the main thing about interval scale?

  We can see distance between 2 point, and such distance is meaningful, but there is no absolute reference point
• What is the main principal of Ratio scales?

  Type of scales, where absolute and natural reference point exists.