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An HR manager had noticed that some people 'went to pieces' during job interviews. She wanted to test whether this performance anxiety was different for people applying for jobs in different areas of the company. She took accountants, sales people and IT technicians (variable = 'job') and measured their anxiety (variable = 'anxiety') during the interview process. She also noted the seniority of the job they were applying for, ranging from level 1 (trainee) to level 8 (top management) . She wanted to see whether the field of job applied for affected anxiety when controlling for position seniority. What test should she use?
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