EPPP ACTUAL EXAM PAPER 2026
QUESTIONS AND SOLUTIONS GRADED A+
◉ When data points are widely scattered around a regression line,
this indicates:
a. low homoscedasticity
b. low correlation coefficient
c. low heteroscedasticity
d. high heteroscedasticity
Answer: b. low correlation coefficient
◉ Heteroscedasticity
Answer: The scatter is uneven (unequal) at different points on the
regression line. For example, there might be high variability around
the regression line at low X (predictor) values and low variability
around the line at high X values. It is different amounts of scatter, but
not high scatter
◉ A psychologist in a hospital is conducting research designed to
assess the effects of a new drug on the social behavior of psychotic
,patients. Which of the following would be the best way to decrease
experimenter bias in this type of study?
a. randomized block design
b. a Solomon four-group design
c. counterbalancing
d. a double-blind study
Answer: d. a double blind study
◉ Which of the following is a measure of "amount of variability
accounted for"?
a. Cohen's d
b. F-ratio
c. alpha
d. eta squared
Answer: d. eta squared
◉ Alpha
Answer: Level of significance set by a researcher prior to analyzing
data
◉ Cohen's d
Answer: Used as an index of effect size, but it is a measure of the
mean difference between two groups.
,◉ F-ratio
Answer: Statistic calculated when using the analysis of variance
◉ The eta coefficient would be used to
a. estimate the strength of a nonlinear relationship between two
continuous variables
b. estimate the strength of the relationship between two rank-
ordered variables
c. estimate the strength of the relationship between two
dichotomous variables
d. estimate the strength of the relationship between a dichotomous
variable and a continuous variable
Answer: a. estimate the strength of a nonlinear relationship between
two continuous variables.
◉ The most common correlation coefficient
Answer: Pearson r
◉ Pearson r
Answer: Used to measure the relationship between two continuous
variables that are related in a linear way
Note: eta is used when there is a nonlinear relationship
, ◉ Phi Coefficient
Answer: Can be used to measure the correlation between two
dichotomous variables (i.e, variables that can take one of two
values)
◉ Point-Bisceral Correlation
Answer: Used to measure the correlation between a dichotomous
variable and a continuous variable.
◉ Spearmena's rho
Answer: Used to measure the correlation between two sets of
ranked data
◉ You have conducted a study to assess the relationship between
salary and job performance, and you find a significant correlation
between these two variables. You assistant tells you that the data fail
to take into account a $25.00 cost of living raise that every empoyee
received. You should:
a. assume the correlation will not be affected
b. not be concerned since the added amount is too small to make a
significant difference
c. decide that the raise invalidated the research
QUESTIONS AND SOLUTIONS GRADED A+
◉ When data points are widely scattered around a regression line,
this indicates:
a. low homoscedasticity
b. low correlation coefficient
c. low heteroscedasticity
d. high heteroscedasticity
Answer: b. low correlation coefficient
◉ Heteroscedasticity
Answer: The scatter is uneven (unequal) at different points on the
regression line. For example, there might be high variability around
the regression line at low X (predictor) values and low variability
around the line at high X values. It is different amounts of scatter, but
not high scatter
◉ A psychologist in a hospital is conducting research designed to
assess the effects of a new drug on the social behavior of psychotic
,patients. Which of the following would be the best way to decrease
experimenter bias in this type of study?
a. randomized block design
b. a Solomon four-group design
c. counterbalancing
d. a double-blind study
Answer: d. a double blind study
◉ Which of the following is a measure of "amount of variability
accounted for"?
a. Cohen's d
b. F-ratio
c. alpha
d. eta squared
Answer: d. eta squared
◉ Alpha
Answer: Level of significance set by a researcher prior to analyzing
data
◉ Cohen's d
Answer: Used as an index of effect size, but it is a measure of the
mean difference between two groups.
,◉ F-ratio
Answer: Statistic calculated when using the analysis of variance
◉ The eta coefficient would be used to
a. estimate the strength of a nonlinear relationship between two
continuous variables
b. estimate the strength of the relationship between two rank-
ordered variables
c. estimate the strength of the relationship between two
dichotomous variables
d. estimate the strength of the relationship between a dichotomous
variable and a continuous variable
Answer: a. estimate the strength of a nonlinear relationship between
two continuous variables.
◉ The most common correlation coefficient
Answer: Pearson r
◉ Pearson r
Answer: Used to measure the relationship between two continuous
variables that are related in a linear way
Note: eta is used when there is a nonlinear relationship
, ◉ Phi Coefficient
Answer: Can be used to measure the correlation between two
dichotomous variables (i.e, variables that can take one of two
values)
◉ Point-Bisceral Correlation
Answer: Used to measure the correlation between a dichotomous
variable and a continuous variable.
◉ Spearmena's rho
Answer: Used to measure the correlation between two sets of
ranked data
◉ You have conducted a study to assess the relationship between
salary and job performance, and you find a significant correlation
between these two variables. You assistant tells you that the data fail
to take into account a $25.00 cost of living raise that every empoyee
received. You should:
a. assume the correlation will not be affected
b. not be concerned since the added amount is too small to make a
significant difference
c. decide that the raise invalidated the research
