A company is considering an organizational change involving the use of self-managed work teams. To assess the attitudes of employees of the company toward this change, a sample of 400 employees is selected and asked whether they favor the institution of self-managed work teams in the organization. Three responses are permitted: favor, neutral, or oppose. The results of the survey, cross-classified by type of job and attitude toward self-managed work teams, are summarized as follows:

a. At the 0.05 level of significance, is there evidence of a relationship between attitude toward self-managed work teams and type of job?
The survey also asked respondents about their attitudes toward instituting a policy whereby an employee could take one additional vacation day per month without pay. The results, cross-classified by type of job, are as follows:

b. At the 0.05 level of significance, is there evidence of a relationship between attitude toward vacation time without pay and type of job?