Question: A nationwide study of Americans revealed that 89% have one or more computers in their homes. A doctor in a free children's clinic suspects that the proportion is lower among the families of the children she treats. She completes a survey and finds that of 120 randomly selected patients 104 have one or more computers at home. Use her survey results and a 0.05 significance level to test her claim that the proportion of her patients who have computers at home is less than the nationwide proportion of 89%.