36. Is the incidence of head or neck pain among video display terminal users related to the monitor angle

(degrees from horizontal)? The paper An Analysis of VDT Monitor Placement and Daily Hours of Use for Female Bifocal Users (Work, 2003: 77—80) reported the accompanying data. Carry out an appropriate test of hypotheses (be sure to include a P-value in your analysis).

Head/

Neck Sample Sample Sample Pain Size Mean SD Yes 32 2.20 3.42 No 40 3.20 2.52