1.假设检验例1 某疫区人患某种病的概率是0.25,且每人患病与否是彼此独立的.今研制一种新的预防药,任选12人做实验,结果这12人服用药后均不患病.问此药是否有效. 分析表面上看,可能认为这药一定有效,因为服用这种药的人都没患病.但理由并不充分,因为未服药的大部分人也没患病,患病的只占25%. 1. Hypothesis Test Example 1 The probability of a person suffering from a disease in an affected area is 0.25, and each person’s illness is independent of each other. Now develop a new preventive drug, optionally 12 people to do the experiment, the result is 12 People are not sick after taking the medicine. Ask if this medicine is effective. Analyzed on the surface, it may be considered that the medicine is effective because the person taking the medicine is not sick. However, the reason is not sufficient because the medicine is not taken. Some people did not get sick, only 25% of the sick.