
True or False Quiz
20 questions

1. By whom was the concept of regression first given?
1 m

2. What does correlation coefficient tell us about? What does it fail to provide?
1 m

3. Under what assumption shall we study the concept of regression?
1 m

4. Which are two variables out of random variable having causeeffect relationship? What are they called? Denote them by symbols.
1 m

5. What are the parameters of Linear Regression Model?
1 m

6. When does the regression Model become perfectly linear, i.e. Y=a+bx?
1 m

7. Which are two methods of fitting a regression line?
1 m

8. Who gave the method of Least Square?
1 m

9. Write an equation of regression line Y on X and X on Y.
1 m

10. When it is said that two regression coefficients are reciprocals of each other?
1 m

11. Interpret 'b'.
1 m

12. State two uses of study of Regression.
1 m

13. What is Prediction Formula?
1 m

14. State the most important property of byx.
1 m

15. If the value of R² is 1 which relation exists between X and Y?
1 m

16. What happens when R² = 0?
1 m

17. Under what circumstances two regression lines are obtained?
1 m

18. Which precautions are to be taken while using a regression line?
1 m

19. State utility of coefficient of determination
1 m

20. When there is no perfect linear correlation between two variables, which line is called the line of regression?
1 m

21. State the nature of linear regression model, if there prevails some uncertainty in the relation between X and Y?
1 m

22. Why is the line of regression obtained by the method of least squares is called the best fitted line?
1 m

23. What can you say about the assumption of linear correlation when the values of R² are close to 0?
1 m

24. Why is the element of uncertainty included in regression model?
1 m

25. Which is the best method of obtaining line of regression?
1 m

26. Recognize dependent and independent variable in the following cases.
1 m

Answer 26
1 m