Question:

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

A.

Coefficient of Correlation

B.

Coefficient of Skewness

C.

Coefficient of Determination

D.

Standard error

Answer» c. Coefficient of Determination

Question:

Regression Coefficient of Y on X is:

A.

bXY

B.

bYX

C.

Not Specified

D.

none

Answer» b. bYX

Question:

If two variables, x and y, have a very strong linear relationship, then:

A.

there is evidence that x causes a change in y

B.

there is evidence that y causes a change in x

C.

there might not be any causal relationship between x and y

D.

None of these alternatives is correct.

Answer» a. there is evidence that x causes a change in y

Question:

The regression coefficient of X on Y is:

A.

bXY

B.

bYX

C.

Not Specified

D.

none

Answer» a. bXY

Question:

The regression coefficients re independent of change of origin but:

A.

Not of Scale

B.

Also of Scale

C.

No Change in scale

D.

none

Answer» a. Not of Scale

Question:

In regression analysis, if the independent variable is measured in kilograms, the dependentvariable:

A.

must also be in kilograms

B.

must be in some unit of weight

C.

cannot be in kilograms

D.

can be any units

Answer» d. can be any units

Question:

If the coefficient of determination is equal to 1, then the correlation coefficient :

A.

must also be equal to 1.

B.

can be either -1 or +1.

C.

can be any value between -1 to +1

D.

must be -1

Answer» b. can be either -1 or +1.

Question:

In a bivariate sample, the sum of squares of differences between marks of observed values of two variables is 33 and the rank correlation between them is 0.8. Find the number of pairs of observations:

A.

12

B.

10

C.

15

D.

18

Answer» b. 10

Question:

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

A.

Coefficient of Correlation

B.

Coefficient of Determination

C.

Standard error of estimate

D.

All of the above

Answer» a. Coefficient of Correlation

Question:

The coefficient of correlation between the regression coefficients is:

A.

Arithmetic Mean

B.

Geometric Mean

C.

Average

D.

none

Answer» b. Geometric Mean