2021 Quantitative Information Analysis(南京大学) 最新满分章节测试答案

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本课程起止时间为:2021-03-11到2021-06-30
本篇答案更新状态:已完结

Chapter 3. QIA methods： correlation and regression Short test for 3.3

1、 问题:Which of the following value shows a positive correlation:
选项：
A:1.0
B:1.5
C:-1.0
D:-1.5
答案: 【1.0】

2、 问题:We usually use _ to test Pearson correlation coefficient.
选项：
A:z-test
B:t-test
C:Normalization
D:Chi-square test
答案: 【t-test】

3、 问题:We usually use __ to test Spearman rank order correlation coefficient.
选项：
A:z-test
B:t-test
C:Normalization
D:Chi-square test
答案: 【z-test】

4、 问题:Which of the following statements of Spearman rank order correlation coefficient and Kendall rank correlation coefficient is true? 
选项：
A:We change original data to rank pair of data in Spearman rank order correlation coefficient to eliminate the influence of outliers.
B:For categorical variables, we need to use Spearman rank order correlation coefficient.
C:For two sequential measurement variables, we need to use Kendall rank correlation coefficient.
D:For continuous, normally distributed, linear variables, we need to use Spearman rank order correlation coefficient.
答案: 【We change original data to rank pair of data in Spearman rank order correlation coefficient to eliminate the influence of outliers.】

Chapter 2. QIA methods： Indicators and measurements Short test for 2.1

1、 问题:Which of the following terminology is the same as reproducibility
选项：
A:Validity
B:Fair
C:Useful
D:Reliability
答案: 【Reliability】

2、 问题:Normalization with z-value can be used for
选项：
A:Normally distributed data
B:Symmetric but not normally distributed data
C:Uniformly distributed data
D:Exponentially distributed data
答案: 【Normally distributed data】

3、 问题:An indicator is a mathematical expression that can be applied to __ data.
答案: 【numerical】

Chapter 3. QIA methods： correlation and regression Short test for 3.1

1、 问题:Which of the following statement of classical analysis and EDA is not true:
选项：
A:In classical analysis, we build models before analysis
B:In EDA, we estimate the model directly after preparing data
C:In classical analysis, we spend most of our time estimating and testing hypothetical models
D:In EDA, we focus more on the true distribution of data and emphasize the visualization of data
答案: 【In EDA, we estimate the model directly after preparing data】

2、 问题:Which one of the following does not belong to the descriptive statistics of one quantitative variable:
选项：
A:Maximum
B:Average
C:40 percentiles
D:Distribution
答案: 【Distribution】

3、 问题:If the following figure is the PDF plot, then _ is the CDF plot. 
选项：
A:
B:
C: 
D: 
答案: 【】

4、 问题:The Matthew effect is examplified in this lecture as: a limited number of papers have a __ number of citations: 
答案: 【(以下答案任选其一都对)large;
big;
great】

Chapter 3. QIA methods： correlation and regression Short test for 3.2

1、 问题:Which of the following cannot be used for bivariate data analysis: 
选项：
A:Scatter plot
B:Pearson’s correlation coefficient
C:One-dimensional distribution
D:Regression analysis
答案: 【One-dimensional distribution】

2、 问题:In situation _, we will use Pearson’s correlation coefficient.
选项：
A:Continuous, normally distributed, linear data
B:Continuous, normally distributed data
C:Two sequential data
D:Continuous, uniformly distributed, linear data
答案: 【Continuous, normally distributed, linear data】

3、 问题:In the example about confidence interval in this lecture, why do we draw samples for 1000 times?
选项：
A:Decrease the negative effect from unusual data points
B:Avoid Matthew effect
C:Increase sample size to facilitate aggregate variable
D:Provide enough data for regression analysis
答案: 【Decrease the negative effect from unusual data points】

4、 问题:Which of the following is not a method used for multivariate data analysis:
选项：
A:Bubble plot
B:Pairwise analysis
C:Single scatter plot
D:Regression analysis
答案: 【Single scatter plot】

Chapter 2. QIA methods： Indicators and measurements Short test for 2.3

1、 问题:The first h articles ranked by the citation counts in descending order form the h-core, then h-tail is
选项：
A:all the other articles outside the h-core
B:the last h articles by the same ranking
C:randomly picked h articles
D:another h articles right following the h-core by the order
答案: 【all the other articles outside the h-core】

2、 问题:Read the following table and answer questions 2-4The h index of this author is   .
选项：
A:4
B:5
C:6
D:7
答案: 【5】

3、 问题:The h-core consists publication
选项：
A:A, B, C
B:A, B, C, D
C:A, B, C, D, E
D:A, B, C, D, E, F
答案: 【A, B, C, D, E】

4、 问题:The extended h-core including publications
选项：
A:A, B, C
B:A, B, C, D
C:A, B, C, D, E
D:A, B, C, D, E, F
答案: 【A, B, C, D, E, F】

Chapter 3. QIA methods： correlation and regression Short test for 3.4

1、 问题:Which of the following statement about regression analysis is not true? 
选项：
A:Regression method analyzes the quantitative causal relationship between the independent variable and the dependent variable.
B:Regression analysis can be divided to quantitative variable regression and classified variable regression.
C:Regression analysis can be classified depending on the number of variables. 
D:Regression analysis is omnipotent. 
答案: 【Regression analysis is omnipotent. 】

2、 问题:In the following equation ,  is __.
选项：
A:residual
B:fitted value
C:real independent variable
D:estimated parameter
答案: 【residual】

3、 问题:According to the rule of OLS, the __ needs to be the smallest.
选项：
A:total sum of squares
B:residual sum of squares
C:explained sum of squares
D:regression
答案: 【residual sum of squares】

4、 问题:Which of the following statement for goodness of fit test for OLS is not true.
选项：
A:Goodness of fit test is used to describe the volatility of Yi relative to its fitted value.
B:TSS = ESS + RSS