某医师用A药治疗9例患者,治愈7人,用B药治疗10例患者,治愈1人,比较两药疗效时,适宜的统计方法是
A Z检验 B
t检验 C
χ<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/12696401_0.gif">检验 D
校正χ<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230104/12696401_0_1.gif">检验 E
直接计算概率法