題組內容

2. In a random sample of 80 adults, 34 are worried that they or someone in their family will become a victim of miscarriage of justice. In another random sample of 110 adults taken a month earlier, 43 were worried that they or someone in their family would become a victim of miscarriage of justice. At α = 0.1, can you reject the claim that the proportion of adults who are worried that they or someone in their family will become a victim of miscarriage of justice has not changed? Please interpret the decision in the context of the original claim by using

(f) (5%) Accordingly, how do we apply the confidence interval for the estimation of the parameter in reality and explain the confidence?