Correlation and Regression (CA Foundation Maths, Statictics, Logic, and Reasoning): Questions 31 - 36 of 42

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Question number: 31

» Correlation and Regression

MCQ▾

Question

The difference between the observed value and the estimated value in regression analysis is known as

Choices

Choice (4) Response

a.

Error

b.

Error or Residue

c.

Residue

d.

Deviation

Question number: 32

» Correlation and Regression

MCQ▾

Question

Regression analysis is concerned with

Choices

Choice (4) Response

a.

Establishing a mathematical relationship between two variables

b.

Predicting the value of the dependent variable for a given value of the independent Variable

c.

Measuring the extent of association between two variables

d.

Both a. and b. are correct

Question number: 33

» Correlation and Regression

MCQ▾

Question

For finding correlation between two attributes, we consider

Choices

Choice (4) Response

a.

Scatter diagram

b.

Pearson’s correlation coefficient

c.

Spearman’s rank correlation coefficient

d.

Coefficient of concurrent deviations.

Question number: 34

» Correlation and Regression

MCQ▾

Question

The two lines of regression become identical when

Choices

Choice (4) Response

a.

r = –1

b.

r = 0

c.

r = 1 or -1

d.

r = 1

Question number: 35

» Correlation and Regression

MCQ▾

Question

If the coefficient of correlation between two variables is 0.7 then the percentage of variation unaccounted for is

Choices

Choice (4) Response

a.

51%

b.

49%

c.

70%

d.

30%

Question number: 36

» Correlation and Regression

MCQ▾

Question

What are the limits of the coefficient of concurrent deviations?

Choices

Choice (4) Response

a.

Between –1 and 1, the limiting values inclusive

b.

Between –1 and 0, including the limiting values

c.

No limit

d.

Between 0 and 1, including the limiting values

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