Correlation and Regression (CA Foundation Maths, Statictics, Logic, and Reasoning): Questions 37  42 of 42
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Question number: 37
» Correlation and Regression
Question
The errors in case of regression equations are
Choices
Choice (4)  Response  

a.  Zero 

b.  Positive 

c.  Negative 

d.  All a. , b. and c. are correct 

Question number: 38
» Correlation and Regression
Question
In case the correlation coefficient between two variables is 1, the relationship between the two variables would be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 
Both a and b are positive 

Question number: 39
» Correlation and Regression
Question
The coefficient of correlation between two variables
Choices
Choice (4)  Response  

a.  Can have any unit. 

b.  Is a unit free measure 

c.  Is expressed as the product of units of the two variables 

d.  All of the above 

Question number: 40
» Correlation and Regression
Question
For finding the degree of agreement about beauty between two Judges in a Beauty Contest, We use
Choices
Choice (4)  Response  

a.  Coefficient of rank correlation 

b.  Scatter diagram 

c.  Coefficient of correlation 

d.  Coefficient of concurrent deviation. 

Question number: 41
» Correlation and Regression
Question
The covariance between two variables is
Choices
Choice (4)  Response  

a.  Always 0 

b.  Strictly positive 

c.  either positive or negative or zero. 

d.  Strictly negative 

Question number: 42
» Correlation and Regression
Question
If the value of correlation coefficient is positive, then the points in a scatter diagram tend to cluster
Choices
Choice (4)  Response  

a.  From lower right corner to upper left corner 

b.  From lower right corner to upper right corner. 

c.  From lower left corner to upper right corner 

d.  From lower left corner to lower right corner 
