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used to categorize and/or quantify variables.
procedure for the assignment of numbers in order to impart some of the characteristics in relation to the question (being surveyed).
SCALE MEASUREMENT
ways in which variables/numbers are defined and categorized.
determines the appropriateness for use of certain statistical analyses.
SCALE MEASUREMENT
Lowest form of measurement Provide least number of data Only satisfies the identity property of measurement
NOMINAL
Represents an ordered series of relationships or rank order.
Each value has a unique meaning, and it has an ordered relationship to every other value on the scale.
ORDINAL
numeric scales in which we know not only the order, but also the exact differences between the values.
measurement has the properties of identity, magnitude, and equal intervals.
INTERVAL
Tell the exact unit (has an absolute zero point)
Contains all of the information of the previous 3 leves
RATIO
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.
SUMMARY
INTERVAL scales give us the order of values + the ability to quantify the difference between each one.
RATIO scales give us the ultimate–order, interval values, plus the ability to calculate ratios since a “true zero” can be defined.
SUMMARY