# 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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