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EEC 3 Exam Answers | BDP EEC 3 Final Exam Answers 2022

EEC 3 Exam Answers | BDP EEC 3 Final Exam Answers 2022

EEC 3 Exam Answers
EEC 3 Exam Answers

EEC 3 Exam Answers | BDP EEC 3 Final Exam Answers 2022

1. b^yx= -0.8, r= -0.96, SD o12

  • C. 10

2. If the two regression lines coincide, then what will be the value of the correlation coefficient?

  • C. ± 1 

3. The index { p^1 q^1 / p0 q0 } falls under which one of the following?

  • B. Value Index

4.  An urn contains 6 red and 4 white balls. Two balls are drawn without replacement. What is the probability that the second ball is red if it is known that the first is red? 

@newswap01
  • C. 5/9 

5. Which one of the following process is the construction of one continuous series from two different index number series with a common base year? 

  • C. Splicing

6. Proportion of boys in a class of 50 students falls in which category of the following? 

  • c. Discrete variable

7. If AM and Coefficient of Variation of x are 6 and 50% respectively, then find out the variance of x. 

  • C. 9 

8. A continuous random variable X has a probability density function given by F(x) = 1/2 – ax , 0 <= x <= 4 = 0 , elsewhere Where, ‘a’ is a constant. Find the value of ‘a’.

  •  C. 1/8 \

9. 7 values of a variable has been given as 

    2, 2^2, 0, 2^3, 2^4, 2^5, 2^6

: Find out the geometric mean.

 B. 0 

10. 10. If the prices of all items change in the same ratio, then the Laspeyre’s and Paasche’s index will be related in the following way 

  • A. Laspeyre’s index = Paasche’s index

11. 11. In presenting the frequency distribution, which one of the following diagrams is meant for a discrete variable? 

  • B. Histogram

12. (Class frequency) / x = Relative frequency What is ‘x’? 

  • D. Total frequency

13. 13. Standard Deviation is dependent on the change of which one of the following? 

  • B. Scale only

14. 14. The period of movement of time series for Seasonal variations is 

  • C. Not more than 1 year

15. 15. How many deciles and how many percentiles are there in a frequency distribution ?

  •  A. 10,100

16. 16. Fall of production in a cement factory due to strike is associated with which one of the following? 

  • B. Cyclical variation

17. 17. For a moderately asymmetric distribution the mean and median are respectively 24.5 and 24.3. Find out the value of Mode 

  • C. 23.9

18. 18. For a symmetrical distribution, find out the third central moment (m3) 

  • D. 0

19. 19. Which index satisfies the Factor Reversal Test? 

  • D. Fisher’s index

20. The 4-yearly moving average method is applied to a time series data for 13 years. How many moving averages can be calculated in this process? 

  • B. 7 

21. If b^yx= ⅓  and b^xy=⅖ , then calculate var y: var x.

  •  A. 5: 6

22. What type of movement in time series data are captured by the secular trend method? 

  • C. Long-term movement

23. 23. Increase of sales of garments during Durgapuja is associated with which one of the following? 

  • D. Seasonal variation

24. 24. The correlation co-efficient lies between which one of the following ranges? 

  • B. +1, -1

25. The lines of regression concerning the two variables x and y are given by y=32-x and x= 13- 0.25y, Calculate the values of X and Y. 

  • A. 6∙7, 25∙3

26. . The number of workers in two different firms are 40 and 60 respectively. Their average weekly wage in the two firms are Rs. 850 and Rs. 880 respectively. If the two firms are clubbed together then what will be the average wage of the combined firm ? 

  • B. Rs. 868

27. 27. Given that the correlation coefficient of x and y is 0∙6 and their covariance is 12. If the standard deviation of x is 5, calculate the standard deviation of y. 

  • A. 4 

28. If the standard deviation of the values –5, –4, –3, –2, –1, 0, 1, 2, 3, 4, 5 be given as _/10 , then find out the standard deviation of the values 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25.

  • _/10

29. 29. In drawing a histogram, what is measured along the abscissa (x-axis)? 

  • B. Class boundary

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