大学MOOC 公安实用统计学（双语）(南京森林警察学院)1454247164 最新慕课完整章节测试答案

练习

1、单选题：
‍The height of a police officer is what type of variable?​
选项：
A: Qualitative (Categorical)
B: Quantitative and continuous
C: Quantitative and discrete
D: Qualitative and continuous
答案: 【 Quantitative and continuous】

2、多选题：
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}In a study of the effect of handedness on athletic ability, participants were divided into three groups: right-handed, left-handed, and ambidextrous. Athletic ability was measured on a 12-point scale. Check all that apply. The variable athletic ability is‎
选项：
A: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}Discrete
B: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}Qualitative
C: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}Continuous
D: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}Quantitative
答案: 【 p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}Discrete;
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}Quantitative】

3、多选题：
‏Which of the following graphs is/are appropriate for the qualitative variable?‍
选项：
A: Pie chart 
B: Line chart
C: Histogram
D: Bar chart
答案: 【 Pie chart ;
Bar chart】

4、判断题：
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}A frequency distribution contains the frequency of every value in the distribution.​
选项：
A: 正确
B: 错误
答案: 【 正确】

课后练习

1、单选题：
‌ Suppose that your data include 4000 observations, and you must choose the number of intervals to represent in your histogram. What does Sturges' rule recommend?( 公式也可以写为m=1 +  Log2 (N))​
选项：
A: Since 12 is the base 2 logarithm of 4096 (which is close to 4000), we should choose 12 intervals.    
B: The base 2 logarithm of 4096 (which is close to 4000) is 13, so Sturges' rule recommends 13 + 1 or 14 intervals.
C:  The base 2 logarithm of 4096 (which is close to 4000) is 12, so Sturges' rule recommends 12 - 1 or eleven intervals.
D: According t