# Correlation and Regression 2

This Quiz contains MCQs about Correlation and Regression Analysis, Multiple Regression Analysis, Coefficient of Determination (Explained Variation), Unexplained Variation, Model Selection Criteria, Model Assumptions, Interpretation of results, Intercept, Slope, Partial Correlation, Significance tests, OLS Assumptions, Multicollinearity, Heteroscedasticity, Autocorrelation, graphical representation of the relationship between the variables, etc. Let us start MCQs about Correlation and Regression Analysis.

1. If $\beta_{yx} = -1.36$ and $\beta_{xy} = -0.34$ then $r_{xy} =$

3. For the regression $\hat{Y}=5$, the value of regression coefficient of $Y$ on $X$ will be

4. If the value of any regression coefficient is zero, then two variables are said to be

5. The strength (degree) of the correlation between a set of independent variables $X$ and a dependent variable $Y$ is measured by

6. If “time” is used as the independent variable in a simple linear regression analysis, then which of the following assumption could be violated

7. The straight line graph of the linear equation $Y=a+bX$, the slope will be downward if

8. To determine the height of a person when his weight is given is

9. Let the coefficient of determination computed to be 0.39 in a problem involving one independent variable and one dependent variable. This result means that

10. What test statistic is used for a global test of significance?

11. A coefficient of correlation is computed to be -0.95 means that

12. A residual is defined as

13. Multicollinearity exists when

14. The percent of the total variation of the dependent variable $Y$ explained by the set of independent variables $X$ is measured by

15. The straight line graph of the linear equation $Y=a+BX$, the slope is horizontal if

16. In multiple regression, when the global test of significance is rejected, we can conclude that

17. The dependent variable is also called

18. The dependent variable is also called

19. If one regression coefficient is greater than one then other will be

20. The straight line graph of the linear equation $Y=a+bX$, the slope will be upward fi

Correlation is a statistical measure used to determine the strength and direction of the mutual relationship between two quantitative variables. The value of correlation lies between $-1$ and $1$. The regression describes how an explanatory variable is numerically related to the dependent variables.

Both of the tools are used to represent the linear relationship between the two quantitative variables. The relationship between variables can be observed either using graphical representation between the variables or numerical computation using appropriate computational formula.

Note that neither regression nor correlation analyses can be interpreted as establishing some cause-and-effect relationships. Both of these can be used to indicate only how or to what extent the variables under study are associated (or mutually related) with each other. The correlation coefficient measures only the degree (strength) and direction of linear association between the two variables. Any conclusions about a cause-and-effect relationship must be based on the judgment of the analyst. Currently working as Assistant Professor of Statistics in Ghazi University, Dera Ghazi Khan. Completed my Ph.D. in Statistics from the Department of Statistics, Bahauddin Zakariya University, Multan, Pakistan. l like Applied Statistics, Mathematics, and Statistical Computing. Statistical and Mathematical software used is SAS, STATA, GRETL, EVIEWS, R, SPSS, VBA in MS-Excel. Like to use type-setting LaTeX for composing Articles, thesis, etc.

### 11 Responses

1. Belsti says:

Good questions but what are the answer

• Muhammad Imdad Ullah says:

Dear Belsti, when you will submit the quiz you will get the answers of all MCQS, however, if you don’t get any answer page, it means you need to update your internet browser or use another browser.

Thanks for visiting and liking my work.

2. UDAYA BAHADUR says:

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• Muhammad Imdad Ullah says:

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3. dhananjay rasal says:

best and knowledge gaining

4. Habiba says:

5. Anuj Chauhan says:

as I think You should explain the answers too.

6. Alfred says:

great and good for revision

7. Khalid Mahmood ANjum says:

Informative but if you add reference of answers, it will be appreciable

8. Rahmat says:

Salam Sir,
Sir l am going to appear in lecturer test therefore I need your kind help
Please share some books for FPSC test.

9. Muhammad Ismail says:

Quite informative and good source of quick learning and assessing one’s self…

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