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Published online by Cambridge University Press: 11 August 2014
page 57 note * Viz. the maximum percentage difference between two percentages which can be attributed to chance at the probability level chosen (see Wilks, S. S. (1940). ‘Confidence limits and critical differences between percentages’, in Public Opinion Quarterly, Vol. IV, pp. 332–338)Google Scholar.
page 57 note † See below for definition of ‘quota’ sampling.
page 58 note * Accurate is used in the sense of ‘unbiased’.