Correlation and Regression (CA Foundation Maths, Statictics, Logic, and Reasoning): Questions 19  24 of 42
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Question number: 19
» Correlation and Regression
Question
The regression line of y on is derived by
Choices
Choice (4)  Response  

a.  The minimization of horizontal distances in the scatter diagram 

b.  The minimization of vertical distances in the scatter diagram 

c.  None of the above 

d.  All of the above 

Question number: 20
» Correlation and Regression
Question
If the relationship between two variables x and y in given by , then the Value of the correlation coefficient between x and y is
Choices
Choice (4)  Response  

a.  0 

b.  1 

c.  1 

d.  negative 

Question number: 21
» Correlation and Regression
Question
If the coefficient of correlation between two variables is –0.9, then the coefficient of determination is
Choices
Choice (4)  Response  

a.  0.81 

b.  0.1 

c.  0.9 

d.  0.19 

Question number: 22
» Correlation and Regression
Question
When we are not concerned with the magnitude of the two variables under discussion, we consider
Choices
Choice (4)  Response  

a.  Product moment correlation coefficient 

b.  Rank correlation coefficient 

c.  Coefficient of concurrent deviation 

d.  All of the above 

Question number: 23
» Correlation and Regression
Question
What is spurious correlation?
Choices
Choice (4)  Response  

a.  It is a negative correlation. 

b.  It is a bad relation between two variables. 

c.  It is very low correlation between two variables. 

d.  It is the correlation between two variables having no causal relation. 

Question number: 24
» Correlation and Regression
Question
If the plotted points in a scatter diagram lie from upper left to lower right, then the Correlation is
Choices
Choice (4)  Response  

a.  Zero 

b.  Positive 

c.  Negative 

d.  None of the above 
