In? randomized, double-blind clinical trials of a new? vaccine, monkeys were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After the first? dose, 114 of 720 subjects in the experimental group? (group 1) experienced vomiting as a side effect. After the first? dose, 70 of 606 of the subjects in the control group? (group 2) experienced vomiting as a side effect. Construct a 90?% confidence interval for the difference between the two population? proportions, p 1 - p 2. Use x 1 =114?, n 1 =720?, x 2 =70?, and n 2 =606.
Find the 90?% confidence interval for p 1 minus p 2 is ?( ), ( )