Question

The correlation coefficient is a summary measure that

Select one:

a. is of limited use because it fails to indicate the direction of the relationship between the variables.

b. indicates the change in Y for a one unit change in X.

c. indicates the strength of linear relationship between a pair of quantitative variables.

d. indicates the proportion of variation in Y that is explained by the variation in X.

e. none of the above.

In regression analysis, the F test statistic is based on the variation in response variable Y that is explained by the model and the variation in Y that is not explained by the model. The F test statistic is

Select one:

a. product of the explained and unexplained variations.

b. sum of the explained and unexplained variations.

c. ratio of the explained variation to the unexplained variation.

d. ratio of the unexplained variation to the explained variation.

e. difference between the explained and unexplained variations.

In Linear Regression, the coefficient of determination can be interpreted as

Select one:

a. the proportion of variation in the explanatory variable that is explained by the regression line.

b. the proportion of variation in the response variable that is explained by the regression line.

c. the proportion of variation in the error that is explained by the regression line.

d. the change in the "Y" variable for a 1 unit change in the "X" variable.

e. none of the above.

Answer 1