M

Mr. Dubey • 51.17K Points
Coach

`Q 1. If bxy and byx are two regression coefficients, they have:`

(A) Same signs
(B) Opposite signs
(C) Either a or b
(D) None of the above.

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Mr. Dubey • 51.17K Points
Coach

`Q 2. If r = ± 1, the two regression lines are...............................`

(A) Coincident
(B) Parallel
(C) Perpendicular to each other
(D) None of these

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Mr. Dubey • 51.17K Points
Coach

`Q 3. The point of intersection of two regression lines is..........................`

(A) (0,0)
(B) (1,1)
(C) (x,y)
(D) (x̄, ӯ)

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Mr. Dubey • 51.17K Points
Coach

`Q 4. If the regression line is Y on X, then the variable X is known as..........................`

(A) Independent variable
(B) Explanatory variable
(C) Regressor
(D) All the above

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Mr. Dubey • 51.17K Points
Coach

`Q 5. The rank correlation coefficient was discovered by....................................`

(A) Fisher
(B) Spearman
(C) Karl Pearson
(D) Bowley

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Mr. Dubey • 51.17K Points
Coach

`Q 6. If all the points of a scatter diagram lie on a straight line falling from left upper corner to the right bottom corner, the correlation is called...................`

(A) Zero correlation
(B) High degree of positive correlation
(C) Perfect negative correlation
(D) Perfect positive correlation

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Mr. Dubey • 51.17K Points
Coach

`Q 7. If one of the regression coefficients is greater than unity, the other must be:`

(A) More than Unity
(B) Less than Unity
(C) Unity
(D) all

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Mr. Dubey • 51.17K Points
Coach

`Q 8. Correlation analysis is a ..............................`

(A) Univariate analysis
(B) Bivariate analysis
(C) Multivariate analysis
(D) Both Bivariate and Multivariate analysis

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Mr. Dubey • 51.17K Points
Coach

`Q 9. For a distribution of data, if the arithmetic mean> median>mode, then which of the following is true?`

(A) The distribution is symmetrical
(B) The distribution is positively skewed
(C) The distribution is negatively skewed
(D) None of these

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Mr. Dubey • 51.17K Points
Coach

`Q 10. Which of the following is true, if there is no dispersion in a data set:`

(A) All the mathematical and positional averages are equal.
(B) All the mathematical averages are equal but the positional averages are not equal
(C) All the mathematical averages are equal to zero
(D) None of these

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