A travel agent randomly sampled individuals in her target market and asked, Did you use a travel agent to book your last airline flight? By cross-referencing the answers to this question with the responses to the rest of the questionnaire, the agent obtained data such as that in the following contingency table:

Determine if there is an association between the respondent's age and use of a travel agent to make reservations for the respondent's last flight.

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Did You Use a Travel Agent to Book Your Last Flight? Age Under 30 30 to 39 40 to 49 50 to 59 60 or older Yes 1530 20 47 36 45 No 42 42 50 20