Escobar performed a study to validate a translated

version of the Western Ontario and McMaster

University index (WOMAC) questionnaire used with

spanish-speaking patient s with hip or knee

osteoarthritis . For the 76 women classified with sever

hip pain. The WOMAC mean function score was 70.7

with 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 sever hip

pain is less than 75 . Let =0.01