You have been asked to use face-to-face questionnaires to collect data from local residents about their 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 below.

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 target population more precisely? Give reasons for your answer.
c. What problems might you encounter in using interviewers?

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