A new blood pressure medication has been manufactured, and a study is being conducted to determine whether its effectiveness depends on dose. When 50 milligrams of the medication was administered to a simple random sample (SRS) of 40 patients, 12 of them demonstrated lower blood pressure. When 100 milligrams of the medication was administered to another SRS of 35 patients, 14 of them demonstrated lower blood pressure. Which of the following test statistics is an appropriate hypothesis test?
A) z = (0.3 - 0.4) / √[(0.3 * (1 - 0.3)) / 40 + (0.4 * (1 - 0.4)) / 35]
B) z = (0.3 - 0.4) / √[(0.3 * (1 - 0.3)) / 75 + (0.4 * (1 - 0.4)) / 75]
C) z = (0.3 - 0.4) / √[(0.3467 * (1 - 0.3467)) / 40 + (0.3467 * (1 - 0.3467)) / 35]
D) z = (0.3 - 0.4) / √[(0.3467 * (1 - 0.3467)) / 75 + (0.3467 * (1 - 0.3467)) / 75]
