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Sam Hill, Director of Media Research in Christchurch, is analysing subscribers to the Fish & Game New Zealand magazine. He wonders whether subscriptions are influenced by the head of household's employment classification. His staff prepared the following contingency table from a random sample of 300 households.

Head of Household Classification
Clerical
Managerial
Professional
Subscribes

Yes
10
90
60
No
60
60
20

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