Who found that over 40% pf respondents to a survey had been wrongly classified in terms of social grade?

Name: Who found that over 40% pf respondents to a survey had been wrongly classified in terms of social grade?
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Question

Quizplus · Accepted Answer

O'Brian and Ford conducted research that revealed over 40% of respondents to a survey had been incorrectly classified in terms of social grade, highlighting the potential inaccuracies in market segmentation and demographic classification.

Who Found That Over 40% Pf Respondents to a Survey