Researchers comparing the effectiveness of two pain medication relievers (A and B) randomly selected a group of patients who had been complaining of a certain kind of joint pain. They randomly divided these people into 2 groups, then administered the pain killers. Of the 120 people in the group who received medication A, only 85 said this pain reliever was effective. Of the 104 people in the group who received medication B, 70 reported that pain reliever B was effective. Construct and interpret a 98% confidence interval for the difference in the proportions p A - pp of people who may find these medications effective. Round the lower and upper bounds of the confidence interval to 1 decimal place. A 98% confidence interval for the difference between the population proportions of people who may find these medications effective is between Number % and Number %