Handwashing VS: handrubbing: The British Medical Journal (August 17, 2002) published the results of a study to compare the effectiveness of handwashing with soap and handrubbing with alcohol. Healthcare workers who used handrubbing had a mean bacterial count of 35 per hand with a standard deviation of 59. Healthcare workers who used handwashing had a mean bacterial count of 69 per hand with a standard deviation of 106. In a random sample of 50 healthcare workers all using the same method of cleaning their hands, the mean bacterial count per hand, X, is less than 30. Give your opinion on whether this sample of workers used handrubbing with alcohol or handwashing with soap.