Question:

The rank correlation coefficient of a debating contest involving 10 participants was calculated as 0.6. However, it was later discovered that the difference in the ranks of some participants was read as 8 instead of 3. Find the correct correlation coefficient:

A.

0.933

B.

0.652

C.

0.854

D.

0.751

Answer» a. 0.933

Question:

If one of the regression coefficient is greater than unity, the other must be:

A.

More than Unity

B.

Less than Unity

C.

Unity

D.

none

Answer» b. Less than Unity

Question:

If the coefficient of determination is a positive value, then the regression equation:

A.

must have a positive slope

B.

must have a negative slope

C.

could have either a positive or a negative slope

D.

must have a positive y intercept

Answer» c. could have either a positive or a negative slope

Question:

In a bivariate distribution, Spearman’s Coefficient of Correlation is -0.25. If the sum of the squares of various ranks is 150, find out the number of pairs of items:

A.

10

B.

8

C.

9

D.

7

Answer» c. 9

Question:

A coefficient of correlation is computed to be -0.95 means that:

A.

The relationship between two variables is weak

B.

The relationship between two variables is strong and positive

C.

The relationship between two variables is strong and but negative

D.

Correlation coefficient cannot have this value

Answer» c. The relationship between two variables is strong and but negative

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