39. Two new drugs have been proposed for treating subjects who suffer from high blood pres- sure. A sample of ten such subjects were randomly allocated to two groups for an ex- periment comparing the drugs. The five subjects in one group took drug A, and the five subjects in the other group took drug B. Following three months of treatment, the drop in blood pressure was measured. The sample values were Drug A. 0, 2, 2.3.3 Drug B: 3, 6. 6.7 8 Analyze these data, and interprct your results.