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

Question:

In regression analysis, the variable that is used to explain the change in the outcome of an experiment, or some natural process, is called:

A.

the x-variable

B.

the independent variable

C.

the predictor variable

D.

the explanatory variable

Answer» c. the predictor variable

Question:

In a regression analysis if r2 = 1, then :

A.

SSE must also be equal to one

B.

SSE must be equal to zero

C.

SSE can be any positive value

D.

SSE must be negative

Answer» b. SSE must be equal to zero

Question:

In regression, the equation that describes how the response variable (y) is related to the explanatory variable (x) is:

A.

the correlation model

B.

the regression model

C.

used to compute the correlation coefficient

D.

None of these alternatives is correct.

Answer» b. the regression model

Question:

In regression analysis, the variable that is being predicted is the:

A.

Response, or dependent, variable

B.

Independent variable

C.

intervening variable

D.

is usually x

Answer» a. Response, or dependent, variable

Question:

If there is a very strong correlation between two variables then the correlation coefficient must be:

A.

any value larger than 1

B.

much smaller than 0, if the correlation is negative

C.

much larger than 0, regardless of whether the correlation is negative or positive

D.

None of these alternatives is correct

Answer» b. much smaller than 0, if the correlation is negative