2024知到答案 Medical Statistics（医学统计学） 完整智慧树网课章节测试答案
第一章 单元测试
文章目录
1、单选题：
Which of the following belongs to continuous numerical variable?（ ）
选项：
A:gender.
B:country
C:age
D:blood type
答案: 【age】
2、单选题：
What is the range of probability P for a random event? （ ）
选项：
A:-1≤P≤0
B:P =1
C:0≤P≤1
D:-1≤P≤1
答案: 【0≤P≤1】
3、单选题：
Which of the following cannot be avoided during sampling? （ ）
选项：
A:sample size is too small
B:personal error
C:sample size is too large
D:sampling error
答案: 【sampling error】
4、单选题：
Low, median and high belong to _____? （ ）
选项：
A:Raw data
B:Ordering data
C:Measuring data
D:Counting data
答案: 【Ordering data】
5、单选题：
Which of the following belongs to discrete numerical variable ________? （ ）
选项：
A:Weight
B:Number of children in a family
C:Height
D:Cancer degree
答案: 【Number of children in a family】
6、单选题：
Which one of the following variables is not categorical? （ ）
选项：
A:Age of a person.
B:Gender of a person: male or female.
C:Choice on a test item: true or false.
D:Marital status of a person (single, married, divorced, other)
答案: 【Age of a person.】
7、单选题：
Which of the following belongs to the measurement data ________. （ ）
选项：
A:WBC counts
B:gender
C:blood type
D:curative effect
答案: 【WBC counts】
8、单选题：
Which of the following belongs to categorical variable ________. （ ）
选项：
A:gender of people in a specific region.
B:heart rate
C:score of IQ
D:days staying in hospital
答案: 【gender of people in a specific region.】
第二章 单元测试
1、单选题：
The measure of dispersion most commonly used in conjunction with the arithmetic mean is the: （ ）
选项：
A:interquartile range
B:variance
C:range
D:standard deviation
答案: 【standard deviation】
2、单选题：
Simply by scanning the values in each distribution below, identify the distribution with the smallest standard deviation.（ ）
选项：
A:9, 9, 9, 10, 10, 10, 10, 11, 11, 11
B:80, 80, 80, 80, 80, 80, 80, 80, 80, 80
C:7, 8, 9, 10, 11, 12, 13, 14, 15, 16
D:6, 6, 9, 10, 11, 12, 14, 17, 20, 90
答案: 【80, 80, 80, 80, 80, 80, 80, 80, 80, 80】
3、单选题：
The most commonly used measure of central location for antibody titers is the:（ ）
选项：
A:arithmetic mean
B:geometric mean
C:median
D:mode
答案: 【geometric mean】
4、单选题：
Which range characterizes the interquartile range?（ ）
选项：
A:From 10th percentile to 90th percentile
B:From 1.96 standard deviations below the mean to 1.96 standard deviations above the mean
C:From 5th percentile to 95th percentile
D:From 25th percentile to 75th percentile
答案: 【From 25th percentile to 75th percentile】
5、单选题：
All of the following are measures of dispersion EXCEPT: （ ）
选项：
A:median
B:range
C:standard deviation
D:interquartile range
答案: 【median】