Question: (Based on Kumura et.al., The Effectiveness of Vaccine Day and Educational Interventions on Influenza Vaccine Coverage Among Health Care Workers at Long-term Care Facilities, AJPH April 2007). A study of flu vaccination among health care workers reported that 50 of 221 workers under age 30 received the vaccination, compared to 180 of 569 workers between the ages of 30 and 49.

Are health care workers under 30 more or less likely to receive the flu vaccine than workers between the ages of 30 and 49? Test through an appropriate statistical procedure.