EDF 5481
Quiz #4
Summer 2013
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question and place it on the line
to the left of the question number.
_D___
_C___
_D___
_D___
_D___
_B___
1. A researcher found a correlation of +1.21 between variables A and B. This means that
a. there is a high relationship between the two variables.
b. the relationship between the two variables is perfect.
c. the variables could be predicted from one another with a high degree of accuracy.
d. a mistake has been made in computation of the coefficient of correlation between
the two variables
2. A research study found that the multiple correlation (R) of three variables (SAT, HS rank, and HS
GPA) with freshman college GPA was .60. The researcher would report that
a. the average correlation of each of the variables with college GPA is .20.
b. 60 percent of the variance in college GPA can be explained by the combined
variables.
c. 36 percent of the variance in college GPA can be explained by the three variables
in combination.
3. The process of applying a prediction equation to another sample independent of the sample on
which the equation was calculated is called
a. construct validation.
b. convergent validation.
c. discriminant validation.
d. cross-validation.
e. concurrent validation.
4. The basic aim of multiple regression is to
a. calculate the correlation between a combination of independent variables and a
number of dependent variables.
b. calculate the average of a combination of correlation coefficients between
predictors and criterion.
c. develop a correlation matrix.
d. calculate the correlation between a combination of independent variables and a
single dependent variable.
5. If X is positively correlated with Y, one can conclude that
a. X probably causes changes in Y.
b. Y probably causes changes in X.
c. changes in X and Y are both probably caused by Z.
d. none of these are true.
6. The correlation between the Graduate Record Examination (GRE) and undergraduate GPA for all
people taking the GRE is .56. If the correlation is recomputed for only those students admitted to
graduate school, the value of the correlation will most likely
a. increase.
b. decrease.
c. stay the same.
_B___
7. A high negative correlation was found between days absent from school and grade achievement
for middle school students. This finding means that
a. absence from school causes low achievement.
b. students who miss school more often tend to make lower grades than students who
attend regularly.
c. low achievement causes high absence from school.
d. measures on the two variables do not tend to covary.
_D___ 8. A researcher wants to hold scholastic aptitude constant when investigating the relationship
between need for achievement and actual achievement in the classroom. What statistical procedure
should the researcher use?
a. Canonical correlation
b. Spearman rho
c. Partial correlation
d. Multiple correlation
_A___ 9. A researcher uses several different measures in an attempt to predict completion of a doctoral
degree in the School of Education. What type of correlational analysis would be most appropriate
to predict this criterion?
a. Discriminant analysis
b. Factor analysis
c. Multiple regression
d. Canonical correlation
e. Path analysis
_D___ 10. Statistical significance of a correlation tells us
a. whether it is useful in a practical situation.
b. whether it is useful for predicting a criterion.
c. how much variance the measures have in common.
d. how likely it is that the observed correlation is only a function of chance.