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

MCQ▾

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

MCQ▾

Question

If the relationship between two variables x and y in given by 2x+3y+4=0 , 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

MCQ▾

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

MCQ▾

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

MCQ▾

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

MCQ▾

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

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