Frequently asked questions
To view our FAQs please see the links in the menu to the right.
Pages in this section
- How do I read a crosstab
- What is an index?
- How do I get a brand added to the questionnaire?
- How is a household defined?
- What is social grading & how is it best used?
- When should I use household weighting rather than population weighting?
- What is the smallest sample size I can use on TGI?
- What are the fieldwork periods & release dates of TGI surveys?
- How representative is the TGI sample?
- How can I find out what is new on the survey?
- How do I know when a variable was first added to the questionnaire & if it has changed over the years?
- How are volumetrics calculated & how do I run one?
