第一章 单元测试

1、 问题:Which of the following belongs to continuous numerical variable?（ ）
选项：
A:age
B:country
C:blood type
D:gender.
答案: 【
age
】

2、 问题:What is the range of probability P for a random event? （ ）
选项：
A:P =1
B:-1≤P≤0
C:0≤P≤1
D:-1≤P≤1
答案: 【
0≤P≤1
】

3、 问题:Which of the following cannot be avoided during sampling? （ ）
选项：
A:sampling error
B:sample size is too small
C:sample size is too large
D:personal error
答案: 【
sampling error
】

4、 问题:Low, median and high belong to _____? （ ）
选项：
A:Counting data
B:Measuring data
C:Ordering data
D:Raw data
答案: 【
Ordering data
】

5、 问题:Which of the following belongs to discrete numerical variable __? （ ）
选项：
A:Number of children in a family
B:Height
C:Weight
D:Cancer degree
答案: 【
Number of children in a family
】

6、 问题: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、 问题:Which of the following belongs to the measurement data __. （ ）
选项：
A:gender
B:WBC counts
C:blood type
D:curative effect
答案: 【
WBC counts
】

8、 问题:Which of the following belongs to categorical variable __. （ ）
选项：
A:score of IQ
B:heart rate
C:days staying in hospital
D:gender of people in a specific region.
答案: 【
gender of people in a specific region.
】

第二章 单元测试

1、 问题:The measure of dispersion most commonly used in conjunction with the arithmetic mean is the: （ ）
选项：
A:interquartile range
B:range
C:standard deviation
D:variance
答案: 【
standard deviation
】

2、 问题:Simply by scanning the values in each distribution below, identify the distribution with the smallest standard deviation.（ ）
选项：
A:6, 6, 9, 10, 11, 12, 14, 17, 20, 90
B:7, 8, 9, 10, 11, 12, 13, 14, 15, 16
C:9, 9, 9, 10, 10, 10, 10, 11, 11, 11
D:80, 80, 80, 80, 80, 80, 80, 80, 80, 80
答案: 【
80, 80, 80, 80, 80, 80, 80, 80, 80, 80
】

3、 问题: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、 问题:Which range characterizes the interquartile range?（ ）
选项：
A:From 5th percentile to 95th percentile
B:From 10th percentile to 90th percentile
C:From 25th percentile to 75th percentile
D:From 1.96 standard deviations below the mean to 1.96 standard deviations above the mean
答案: 【
From 25th percentile to 75th percentile
】

5、 问题:All of the following are measures of dispersion EXCEPT: （ ）
选项：
A:interquartile range
B:median
C:range
D:standard deviation
答案: 【
median
】

第三章 单元测试

1、 问题:Which of the following is not applicable to describe categorical data? （ ）
选项：
A:Rate
B:Ratio
C:Proportion
D:Mean
答案: 【
Mean
】

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