Topic 5

Topic 5

University

5 Qs

quiz-placeholder

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Topic 5

Topic 5

Assessment

Quiz

Business

University

Hard

Created by

Salvador Ramallo Ros

Used 1+ times

FREE Resource

5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following values ​​for the correlation coefficient indicates a high degree of inexact positive linear correlation between the two variables considered:

1

0.85

0.56

-0.98

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The maximum value of the covariance statistic is 1, which indicates an exact linear relationship between the two variables analyzed.


True

False

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

There are two variables X and Y. The covariance between them is 25.3, the variance of X is 12 and the variance of Y is 81. The value of the correlation coefficient between both variables is:


65.73

0.81

0.026

Can't be estimated

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following regression line has been estimated between two variables X and Y: Y=200+7X. Indicate which of the following statements is incorrect.


If X increases by one unit, Y will increase by 7 units


If Y increases by one unit, X will increase by 7 units


The value of the variable Y depends on the value of the variable X

If X=0, the value of variable Y is equal to 200


5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

There are two variables X and Y. The covariance between them is 30, the variance of X is 15 and the variance of Y is 81. The value of the coefficient b of the regression line Y=a+bX is equal to


1

2

3

0