Final exam Research and data Michelle
Voss University Of Iowa
Mediator ...ANSWER...A variable that helps explain the meaningful association between two
variables that have an existing correlation, because the mediator
variable arises from or is internal to the independent variable.
Moderator ...ANSWER...• When the relationship between two variables changes in strength
depending on the level of a third variable. Here the moderator variable modifies the strength of the
association between the IV and
the DV.
Third Variable ...ANSWER...A variable that represents a plausible alternative explanation for an
existing correlation between two variables
Which of the following could not be an R2 value for a regression:
1
1.5
.50
0 ...ANSWER...1.5
Given Y' = .005(X) + .40 for predicting college GPA from SAT critical reading scores, the coefficient of X
(.005) indicates that the correlation between college GPAs and SAT I scores
positive
negative
, weak
strong ...ANSWER...positive
Given Y' = .005(X) + .40 for predicting college GPA from SAT critical reading scores, the predicted GPA
for a student with an SAT score of 600 would be
0.70
3.00
3.40
4.00 ...ANSWER...3.4
Given Y' = .005(X) + .40 for predicting college GPA from SAT critical reading scores, a student
concentrates on raising his SAT score in order to raise his college GPA. This strategy is questionable
because it assumes that the relationship between SAT scores and college GPAs is causal. This example
demonstrates that a/an ___________ of the dependent variable is not the same as the cause of the
dependent variable.
inference
description
outcome
predictor ...ANSWER...predictor
Which one of the following numbers would be preferable for the standard error of estimate?
60
20
100
40 ...ANSWER...20
Which of the following tells you that an association claim is being made?
The fact that one variable was manipulated
The statistic used to interpret the results
The graph used to interpret the results
Voss University Of Iowa
Mediator ...ANSWER...A variable that helps explain the meaningful association between two
variables that have an existing correlation, because the mediator
variable arises from or is internal to the independent variable.
Moderator ...ANSWER...• When the relationship between two variables changes in strength
depending on the level of a third variable. Here the moderator variable modifies the strength of the
association between the IV and
the DV.
Third Variable ...ANSWER...A variable that represents a plausible alternative explanation for an
existing correlation between two variables
Which of the following could not be an R2 value for a regression:
1
1.5
.50
0 ...ANSWER...1.5
Given Y' = .005(X) + .40 for predicting college GPA from SAT critical reading scores, the coefficient of X
(.005) indicates that the correlation between college GPAs and SAT I scores
positive
negative
, weak
strong ...ANSWER...positive
Given Y' = .005(X) + .40 for predicting college GPA from SAT critical reading scores, the predicted GPA
for a student with an SAT score of 600 would be
0.70
3.00
3.40
4.00 ...ANSWER...3.4
Given Y' = .005(X) + .40 for predicting college GPA from SAT critical reading scores, a student
concentrates on raising his SAT score in order to raise his college GPA. This strategy is questionable
because it assumes that the relationship between SAT scores and college GPAs is causal. This example
demonstrates that a/an ___________ of the dependent variable is not the same as the cause of the
dependent variable.
inference
description
outcome
predictor ...ANSWER...predictor
Which one of the following numbers would be preferable for the standard error of estimate?
60
20
100
40 ...ANSWER...20
Which of the following tells you that an association claim is being made?
The fact that one variable was manipulated
The statistic used to interpret the results
The graph used to interpret the results
