In the article "Correlates for Completion of 3-dose Regimen of HPV Vaccine in Female Members of a Managed Care Organization" (Mayo Clinical Proceedings, Vol. 84, pp. 864- 870), C. Chao et al. examined factors that may influence whether young female patients complete a three-injection sequence of the Gardasil quadrivalent human papillomavirus vaccine (HPV4). HPV is a virus that has been linked to the development of cervical cancer. The following contingency table summarizes the data obtained for completion of treatment versus practice type.

a. At the 5% significance level, do the data provide sufficient evidence to conclude that an association exists between completion of treatment and practice type?
b. Repeat part (a) at the 1% significance level.

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Completion Yes No Total Pediatric 162353515 Famil OB/GYN 201 332533 Total 469 944 1413