Suppose a hiring manager is interested in hiring an external recruiting service to help find highly qualified applicants for open positions. The manager is able to get information from a similar organization about the effectiveness of the local recruiting services, and would like to know if there are differences in the proportion of individuals hired when comparing those recommended by services A, B, and C. The variables in the manager's data set are: Success: was an applicant hired (yes or no) Recruiting Service recruitment service A recruitment service B recruitment service C What method should the manager use? Question 28 options: Pearson's Chi-Squared Test 2-proportion Z-test t-test ANOVA