Medical Statistics（医学统计学）答案2023

第十章测试

1.Compared with parametric test, the advantages of nonparametric rank sum test are as follows:（ ）
A:Make full use of information B:Wide application range C:high test efficiency D:The test results are more accurate
答案:B
2.For the comparison of measurement data, the nonparametric method is used to analyze under the condition that the parameter method is satisfied （ ）
A:Add type I error B:Reduce type I errors C:add type II error D:reduce type II errors 3.Rank sum test of two samples comparison: if the sample size is fixed, the greater the difference between the two groups of rank sum indicates（ ）
A:The greater the difference between the two samples, the more reasonable the difference between the two populations B:The greater the difference between the two populations C:The more reason to say that there is no difference between the two populations D:the smaller the difference between the two populations 4.In a clinical trial study, the curative effect is divided into four grades: "cured, markedly effective, effective and ineffective". Now, if you want to compare the treatment effect between the experimental group and the control group, the appropriate statistical method is （ ）。
A:chi square test B:contingency chi square test C:Wilcoxon Rank Sum test (Mann-Whitney U test) D:Fisher exact test 5.Compared with the t-test, the advantage of the Rank Sum test is （ ）
A:The calculation is simple and not restricted by distribution B:High inspection efficiency C:Small sampling error D:The formula is more reasonable