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

MCQ▾

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

MCQ▾

Question

In case the correlation coefficient between two variables is 1, the relationship between the two variables would be

Choices

Choice (4) Response
a.

y=a+bx

b.

y=a+bx,b<0

c.

y=a+bx,b>0

d.

y=a+bx

Both a and b are positive

Question number: 39

» Correlation and Regression

MCQ▾

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

MCQ▾

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

MCQ▾

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

MCQ▾

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

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