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Interval Definition

Taking a given number of units equally selected over the full population of study. The nth number interval is derived by dividing the total number of units by the sample number desired. Also known as nth selection.

Interval refers to a type of measurement scale in which the distance between values is meaningful and consistent, but there is no true zero point. Common examples include temperature scales and satisfaction ratings.

What are key aspects of an interval in marketing research?

• Values are ordered and evenly spaced.
• Allows for the calculation of means and standard deviations.
• Lacks an absolute zero, so ratios are not meaningful.
• Frequently used in attitude and opinion measurement.
• Enables advanced statistical analysis.

Why is an interval important in market research?

It provides a robust way to quantify and analyze subjective data like satisfaction, agreement or likelihood. Interval scales support meaningful comparisons and statistical modeling, enhancing the depth and accuracy of insights.

Who relies on an interval in marketing research?

• Survey designers.
• Data analysts and statisticians.
• Brand tracking teams.
• Customer experience researchers.
• Academic and commercial research professionals.

How do market researchers use intervals?

Researchers use interval scales in surveys to measure perceptions, attitudes and preferences. The data is then analyzed using techniques such as regression, correlation and factor analysis to uncover patterns and inform decision-making.