Statitistic MCQ from books

Q1. —– is widely used for prediction
a) regression analysis
b) correlation analysis
c) analysis of variance
d) analysis of covariance

Correct Answer a) regression analysis

Q2. The linear regression analysis can be classified in to
a) 4 types
b) 3 types
c) 2 types
d) none of the above

Correct Answer c) 2 types

Q3. The linear equation Y = a + bx is called as regression equation of
a) X on Y
b) Y on X
c) between X and Y
d) ‘a’ on ‘b’

Correct Answer b) Y on X

Q4. In regression equation X = a + by + e is
a) correlation coefficient of Y on X
b) correlation coefficient of X on Y
c) regression coefficient of Y on X
d) regression coefficient of X on Y

Correct Answer d) regression coefficient of X on Y

Q5. b_yx

Correct Answer B

Q6. If b_XY > 1 then b_YX is
a) 1
b) 0
c) > 1
d) < 1

Correct Answer D

Q7. In the Regression equation

a) b_YX
b) b_XY
c) r_XY
d) cov(X,Y)

Correct Answer a) b_YX

Q8. Using the regression coefficients we can calculate
a) cov(X, Y)
b) SD(X)
c) correlation coefficient
d) coefficient of variance

Correct Answer c) correlation coefficient

Q9. Arithmetic mean of the regression coefficients b_XY and b_YX is
a) > r_XY
b) ≥ r_XY
c) ≤ r_XY
d) < rXY

Correct Answer b) ≥ rXY

Q10. Regression analysis helps in establishing a functional relationship between —– variables.
a) 2 or more variables
b) 2 variables
c) 3 variables
d) none of these

Correct Answer a) 2 or more variables

Q11. —– is the Father of mental tests
a) R.A. Fisher
b) Croxton and Cowden
c) Francis Galton
d) A.L. Bowley

Correct Answer c) Francis Galton

Q12. Correlation coefficient is the —– between the regression coefficients
a) arithmetic mean
b) geometric mean
c) harmonic mean
d) none of the above

Correct Answer b) geometric mean

Q13. If the two lines of regression are perpendicular to each other then r_XY =
a) 0
b) 1
c) –1
d) 0.5

Correct Answer a) 0

Q14. If the two regression lines are parallel then
a) r_XY = 0
b) r_XY = +1
c) r_XY = –1
d) r_XY = ± 1

Correct Answer d) rXY = ± 1

Q15. Angle between the two regression lines is

Correct Answer C

Q16. Regression equation of X on Y is
a) Y = a + b_YXx + e
b) Y = b_XYx + a + e
c) X = a + b_XYy + e
d) X = b_YXy + a + e

Correct Answer c) X = a + bXYy + e

Q17. For the regression equation 2Y^{^}= 0.605x + 351.58. e regression coefficient of Y on X is
a) b_XY = 0.3025
b) b_XY = 0.605
c) b_YX = 175.79
d) b_YX = 351.58

Correct Answer a) bXY = 0.3025

Q18. If b_XY = 0.7 and ‘a’ = 8 then the regression equation of X on Y is
a) Y = 8 + 0.7 X
b) X = 8 + 0.7 Y
c) Y = 0.7 + 8 X
d) X = 0.7 + 8 Y

Correct Answer b) X = 8 + 0.7 Y

Q19. The regression lines intersect at
a) (X̄, Ȳ)
b) (X, Y)
c) (0, 0)
d) (1, 1)

Correct Answer a) (X̄, Ȳ)