30.Ibuprofen is the magical headache and inflammation cure-all drug. In clinical trials, 19 out of

863 randomly, independently picked patients taking 200 mg of Ibuprofen daily complained of

vomiting a material that looks like coffee grounds (this is a real side effect). Suppose that it is

known that 1.9% of patients taking competing drugs complain of vomiting a coffee

grounds-like substance. Is there evidence to conclude that more than 1.9% of Ibuprofen users

experience the vomiting side effect at the a = 0.01 level of significance?