How to determine which scale to use: Nominal vs Interval?

Nominal scale is a naming scale, where variables are simply “named” or labeled, with no specific order. Ordinal scale has all its variables in a specific order, beyond just naming them. Interval scale offers labels, order, as well as, a specific interval between each of its variable options.

How do I know if my data is nominal ordinal interval or ratio?

There are 4 levels of measurement, which can be ranked from low to high:

  1. Nominal: the data can only be categorized.
  2. Ordinal: the data can be categorized and ranked.
  3. Interval: the data can be categorized and ranked, and evenly spaced.
  4. Ratio: the data can be categorized, ranked, evenly spaced and has a natural zero.


What are nominal scales used for?

A nominal scale is a scale of measurement used to assign events or objects into discrete categories. This form of scale does not require the use of numeric values or categories ranked by class, but simply unique identifiers to label each distinct category.

What is the main difference between an ordinal scale and an interval scale and between an interval scale and a ratio scale?

The difference between interval and ratio scales comes from their ability to dip below zero. Interval scales hold no true zero and can represent values below zero. For example, you can measure temperature below 0 degrees Celsius, such as -10 degrees. Ratio variables, on the other hand, never fall below zero.

What is nominal scale with example?

A nominal scale is a scale (of measurement) that uses labels to classify cases (measurements) into classes. Some examples of variables that use nominal scales would be religious affiliation, sex, the city where you live, etc. Example. One example of a nominal scale could be “sex”.

How do nominal ordinal intervals and ratios differ?

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You can look at the ratio of two measurements remembering the basic differences can help you remember the levels of measurement. Nominal is named ordinal is ordered interval.

How is interval scale different from ratio scale?

In an interval scale, the data collected can be added, subtracted, and multiplied. The scale allows computing the degree of difference but not the ratio between them. A ratio scale permits not only addition, subtraction, and multiplication but also division. That is, you can calculate the ratio of the values.

How is the interval scale more sophisticated than the nominal and ordinal scales?

In summary, nominal variables are used to “name,” or label a series of values. Ordinal scales provide good information about the order of choices, such as in a customer satisfaction survey. Interval scales give us the order of values + the ability to quantify the difference between each one.

Which scale of measurement is between the ordinal and ratio scales?

interval scale

An interval scale is one where there is order and the difference between two values is meaningful. Examples of interval variables include: temperature (Farenheit), temperature (Celcius), pH, SAT score (200-800), credit score (300-850).

What are examples of nominal ordinal interval and ratio?

4. Nominal Ordinal Interval Ratio

  • Age. *
  • Weight.
  • Height.
  • Sales Figures.
  • Ruler measurements.
  • Income earned in a week.
  • Years of education.
  • Number of children.


Which of the following can be defined for both nominal and ordinal data?

Explanation: The percentage and frequency, also known as mode, can be analysed using a bar chart or a pie chart. In both nominal and ordinal data, the modal value is convincing. The data is categorical, both nominal and ordinal.