RESEARCH METHODS EXAM #9 QUIZ QUESTIONS AND ANSWERS
The relationship between number of hours a student studies research methods
materials and their grade on the research methods final exam would be best described
by which of the following:
No correlation
Positive correlation
Irrelevant
Negative correlation - correct answer positive correlation
A researcher calculates the correlation between number of quiz attempts taken and the
number of points earned on the quiz. The researcher finds an r value of 0.87, which is
considered a strong negative correlation. (t/f) - correct answer false
In the regression equation Y = a + bx, b refers to the slope of the line that best fits the
data on the scatterplot. (t/f) - correct answer true
What is a partial correlation?
A procedure that allows researchers to examine the relationship between two variables
that are discrete rather than continuous in nature.
A procedure that allows researchers to calculate a correlation between two variables
that attempts to control for third variables statistically.
A correlation between two variables that has a strong r value (either positive or
negative) but has a p value that is greater than 0.05.
A correlation with an r value between -0.09 and +0.09. - correct answer A procedure
that allows researchers to calculate a correlation between two variables that attempts to
control for third variables statistically.
If a researcher wanted to examine the effect of two predictor variables (amount of turkey
eaten and number of family members present) on a single outcome variable (the stress
level during the meal), how would the researcher go about testing this relationship?
The researcher would use single regression.
The researcher cannot examine the effect of two predictor variables on a single
outcome variable.
The researcher would use multiple regression.
The researcher would find the best fitting line. - correct answer The researcher would
use multiple regression.
The third variable problem can cause problems in both correlational studies and
experimental studies. (t/f) - correct answer true
In a correlational design, it is not possible to conclude causation unless the researcher
is very precise in the measurement of the predictor and outcome variable. - correct
answer false
, In the study of Czech ornithologists, we are not sure if increased beer drinking caused
decreased research productivity, or if decreased research productivity caused increased
beer drinking. This issue is an example of what?
The correlation problem
The regression problem
The directionality problem
The drunk flamingo problem, lol
The predictability problem - correct answer the directionality problem
If Dr. Chapman makes predictions on the basis of correlational research, she is using a
regression analysis. (t/f) - correct answer true
An r value of 0.0001 would suggest that there is no correlation between variables. (t/f) -
correct answer true
A criterion variable is another term for the predictor variable. (t/f) - correct answer false
A researcher conducts a correlational study and finds that there is a strong positive
correlation between the amount of turkey eaten at Thanksgiving dinner and the duration
of naps taken after Thanksgiving dinner. Which of the following statements is NOT true,
based on the information provided here.
Eating large amounts of turkey causes people to take longer naps after Thanksgiving
dinner.
There is no way to determine the directionality of the relationship between the amount
of turkey eaten and the length of naps taken based on this study alone.
People who eat smaller portions of turkey tend to take shorter naps after Thanksgiving
dinner.
Longer nap times are associated with larger turkey amounts. - correct answer Eating
large amounts of turkey causes people to take longer naps after Thanksgiving dinner.
An elementary school teacher notices that as the day wears on, his students tend to act
more and more disobedient. He wonders if there is a relationship between the time of
day and the level of disobedience. If you were to design a correlational study with a
predictor variable of the the number of hours a child has spent in school that day and an
outcome variable of the level of disobedience displayed, what type of relationship would
you expect to find?
There is not enough information provided to answer this question.
A positive correlation between time of day and disobediance level.
A negative correlation between time of day and disobediance level.
No correlation between time of day and disobediance level. - correct answer A positive
correlation between time of day and disobedience level.
What kind of effect does restricting the range of one (or both) variables have on a
correlation between two variables?
The relationship between number of hours a student studies research methods
materials and their grade on the research methods final exam would be best described
by which of the following:
No correlation
Positive correlation
Irrelevant
Negative correlation - correct answer positive correlation
A researcher calculates the correlation between number of quiz attempts taken and the
number of points earned on the quiz. The researcher finds an r value of 0.87, which is
considered a strong negative correlation. (t/f) - correct answer false
In the regression equation Y = a + bx, b refers to the slope of the line that best fits the
data on the scatterplot. (t/f) - correct answer true
What is a partial correlation?
A procedure that allows researchers to examine the relationship between two variables
that are discrete rather than continuous in nature.
A procedure that allows researchers to calculate a correlation between two variables
that attempts to control for third variables statistically.
A correlation between two variables that has a strong r value (either positive or
negative) but has a p value that is greater than 0.05.
A correlation with an r value between -0.09 and +0.09. - correct answer A procedure
that allows researchers to calculate a correlation between two variables that attempts to
control for third variables statistically.
If a researcher wanted to examine the effect of two predictor variables (amount of turkey
eaten and number of family members present) on a single outcome variable (the stress
level during the meal), how would the researcher go about testing this relationship?
The researcher would use single regression.
The researcher cannot examine the effect of two predictor variables on a single
outcome variable.
The researcher would use multiple regression.
The researcher would find the best fitting line. - correct answer The researcher would
use multiple regression.
The third variable problem can cause problems in both correlational studies and
experimental studies. (t/f) - correct answer true
In a correlational design, it is not possible to conclude causation unless the researcher
is very precise in the measurement of the predictor and outcome variable. - correct
answer false
, In the study of Czech ornithologists, we are not sure if increased beer drinking caused
decreased research productivity, or if decreased research productivity caused increased
beer drinking. This issue is an example of what?
The correlation problem
The regression problem
The directionality problem
The drunk flamingo problem, lol
The predictability problem - correct answer the directionality problem
If Dr. Chapman makes predictions on the basis of correlational research, she is using a
regression analysis. (t/f) - correct answer true
An r value of 0.0001 would suggest that there is no correlation between variables. (t/f) -
correct answer true
A criterion variable is another term for the predictor variable. (t/f) - correct answer false
A researcher conducts a correlational study and finds that there is a strong positive
correlation between the amount of turkey eaten at Thanksgiving dinner and the duration
of naps taken after Thanksgiving dinner. Which of the following statements is NOT true,
based on the information provided here.
Eating large amounts of turkey causes people to take longer naps after Thanksgiving
dinner.
There is no way to determine the directionality of the relationship between the amount
of turkey eaten and the length of naps taken based on this study alone.
People who eat smaller portions of turkey tend to take shorter naps after Thanksgiving
dinner.
Longer nap times are associated with larger turkey amounts. - correct answer Eating
large amounts of turkey causes people to take longer naps after Thanksgiving dinner.
An elementary school teacher notices that as the day wears on, his students tend to act
more and more disobedient. He wonders if there is a relationship between the time of
day and the level of disobedience. If you were to design a correlational study with a
predictor variable of the the number of hours a child has spent in school that day and an
outcome variable of the level of disobedience displayed, what type of relationship would
you expect to find?
There is not enough information provided to answer this question.
A positive correlation between time of day and disobediance level.
A negative correlation between time of day and disobediance level.
No correlation between time of day and disobediance level. - correct answer A positive
correlation between time of day and disobedience level.
What kind of effect does restricting the range of one (or both) variables have on a
correlation between two variables?
