Glossary
Survey vs. Questionnaire: What's the Difference?
A survey is the whole project, the questionnaire is the instrument inside it. We show you the difference, where forms and studies end, and what standardization means.
Glossary
Glossary
Absolute Scale: Definition, Examples and How to Use It
An absolute scale counts in units that cannot be converted into anything else, because a headcount stays a headcount. We show you how to recognize it and what you may calculate.
Glossary
Ratio Scale: Definition, Examples and Allowed Statistics
Zero dollars means no income, but zero degrees Fahrenheit does not mean no heat. That one difference decides whether you may say “twice as much” about your data.
Glossary
Interval Scale: Definition, Examples and Calculations
An interval scale has equal gaps but no true starting point, which is what makes GPA such an awkward case. We show you what you may calculate and where rating scales sit.
Glossary
What is a Cardinal Scale? Definition and Example
Cardinal scale and metric scale mean the same thing. In English statistics that is the interval and ratio scales. Includes the four-question test and what you can calculate.
Glossary
What is an Ordinal Scale? Definition and Example
How to spot an ordinal scale in your questionnaire: the two conditions behind a rank order, the numbers that hold up and the tests that go with them.
Glossary
What is a Nominal Scale? Definition and Example
A nominal scale sorts answers into categories without ranking them. We show you US examples, the calculations you are allowed to run and how it differs from an ordinal scale.
Glossary
What is a Rating Scale? Definition and Example
We show you which types of rating scale exist, how many steps yours needs, how to word them and which statistic you are allowed to report at the end.
Glossary
What does Objectivity Mean? Definition and Example
What objectivity as a quality criterion actually requires: the three parts, practical measures for your own survey and why no single figure can express it.
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