You have been asked to undertake a survey of residents’ opinions regarding the siting of a new supermarket in an inner city suburb (estimated catchment population 111,376 at

the last census). The age and gender distribution of the catchment population at the last census is listed above.
a Devise a quota for a quota sample using these data.
b What other data would you like to include to overcome likely variations between groups in their availability for interview and replicate the total population more precisely? Give reasons for your answer.
c What problems might you encounter in using interviewers?

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Age group Gender 0-4 5-15 16-19 20-29 30-44 45-59/64* 60/65# -74 75+ Males 3498 7106 4884 7656 9812 12892 4972 2684 Females 3461 6923 6952 9460 8152 9152 9284 4488 *59 females, 64 males; "60 females, 65 males.