Escobar et al. (A-3) performed a study to validate a translated version of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire used with Spanish-speaking patients...

Escobar et al. (A-3) performed a study to validate a translated version of the Western Ontario and
McMaster Universities Osteoarthritis Index (WOMAC) questionnaire used with Spanish-speaking
patients with hip or knee osteoarthritis. For the 76 women classified with severe hip pain, the
WOMAC mean function score (on a scale from 0 to 100 with a higher number indicating less
function) was 70.7 with a standard deviation of 14.6. We wish to know if we may conclude that the
mean function score for a population of similar women subjects with severe hip pain is less than
75. Let α=0. 01.