PSYC 355 EXAM 2 REVIEW QUESTIONS
What is the standardized regression equation based on? - answer -z score
A local church hires you to determine if age of church member is associated with
sunday service attendance. To answer the church's question, which statistical test
would you use? - answer -correlation
After conducting a correlation analysis, the researcher found a strong positive
correlation between the variables. Which of the following correlation coefficients would
line up with this finding? (1.12, 0.78, -0.82, 0.42) - answer -0.78: a strong positive
relationship is going to be the closest to +1.
What is a positive correlation? - answer -as scores on the x-variable goes up, the y-
varaibles tends to go up as well
What is a negative correlation? - answer -as scores on the x- variable go up, the y-
variable goes down
What is no correlation? - answer -as scores on the x-variables goes up, the y-variables
does not go in a particular relationship
"a researcher was investigating the relationship between looniness and the number of
close relationships in college students. After conducting a correlation on the data, they
decided to run a simple linear regression on the data with loneliness as the predictor
variable and the number of close relationships as the outcome variable. Using the
regression equation info below, predict the z-score for the close relationship that
someone has based on having a loneliness z-score of 2.25 (beta is -0.82) - answer --
1.845
A pearson's bivariate correlation quantifies... - answer -the linear relationship between
two scale variables
Regression uses scores on the predictor variables to predict scores on the outcome
variables (t/f) - answer -true
A researcher wants to know if type of profiles picture you have on facebook (one of
yourself or one of you with a friend) and your gender (male or female) play a role in how
many people view your facebook profile over the course of a month. Which stat test
would you use? - answer -two-way anova
Unless the correlation between two variables is perfect, a simple linear regression will
have.... - answer -error
, A researcher was investigating the relationship between loneliness and the number of
close relationship in college students. After conducting a correlation on the data, they
decided to run a simple linear regression on the data with loneliness as the predictor
and number of close relationship as the outcome variable. Using the regression
equation info below, predict the number of close relationships that someone has based
on having a loneliness score of 8
Unstandardized slope= 0.050
Y-intercept= 0.450 - answer -0.85
Which statistical test would you use?
Dr. Kelley investigated the impact of different drugs on rat's performance in a radical
arm maze. Specifically, he randomly assigned some rats to receive cocaine, some rats
to receive weed, and some rats to receive meth. All the rats were measure on the time it
took to receive the maze - answer -one-way anova
A research team wanted to investigate if personality traits predict anxiety scores. To
investigate this, the researcher collected a sample of 254 adults (53%). The participants
were measured on the outcome variable, anxiety, using the gad-7. After this,
participants completed the big five inventory, which measures extraversion,
agreeableness, conscientiousness, neuroticism, and openness
Extraversion: p = .011
Agreeableness: p = .072
Conscientiousness: p = .048
Neuroticism: p = .004
Openness: p = .152
Which of the following conclusions is appropriate? - answer -extraversion,
conscientiousness, and neuroticism are statistically significant individual predictors of
anxiety (while controlling for the predictors)
For multiple linear regression, msregression refers to ______ and ms residual refers to
____ - answer -variance predicted by the overall regression model; error in the overall
regression model's prediction
A research team wanted to investigate if personality traits predict anxiety scores. To
investigate this, the researchers collected a sample of 254 adults (53% female). The
participants were measured on the outcome variable, anxiety, using the gad-7. After
this, participants completed the big five inventory, which measured extraversion,
agreeableness, conscientiousness, neuroticism, and openness. The research team then
used these five personality traits to predict anxiety scores. Which of the following is the
outcome variable? - answer -anxiety
Multiple regression uses.. - answer -two or more predictor variables to predict a single
outcome variables
What is the standardized regression equation based on? - answer -z score
A local church hires you to determine if age of church member is associated with
sunday service attendance. To answer the church's question, which statistical test
would you use? - answer -correlation
After conducting a correlation analysis, the researcher found a strong positive
correlation between the variables. Which of the following correlation coefficients would
line up with this finding? (1.12, 0.78, -0.82, 0.42) - answer -0.78: a strong positive
relationship is going to be the closest to +1.
What is a positive correlation? - answer -as scores on the x-variable goes up, the y-
varaibles tends to go up as well
What is a negative correlation? - answer -as scores on the x- variable go up, the y-
variable goes down
What is no correlation? - answer -as scores on the x-variables goes up, the y-variables
does not go in a particular relationship
"a researcher was investigating the relationship between looniness and the number of
close relationships in college students. After conducting a correlation on the data, they
decided to run a simple linear regression on the data with loneliness as the predictor
variable and the number of close relationships as the outcome variable. Using the
regression equation info below, predict the z-score for the close relationship that
someone has based on having a loneliness z-score of 2.25 (beta is -0.82) - answer --
1.845
A pearson's bivariate correlation quantifies... - answer -the linear relationship between
two scale variables
Regression uses scores on the predictor variables to predict scores on the outcome
variables (t/f) - answer -true
A researcher wants to know if type of profiles picture you have on facebook (one of
yourself or one of you with a friend) and your gender (male or female) play a role in how
many people view your facebook profile over the course of a month. Which stat test
would you use? - answer -two-way anova
Unless the correlation between two variables is perfect, a simple linear regression will
have.... - answer -error
, A researcher was investigating the relationship between loneliness and the number of
close relationship in college students. After conducting a correlation on the data, they
decided to run a simple linear regression on the data with loneliness as the predictor
and number of close relationship as the outcome variable. Using the regression
equation info below, predict the number of close relationships that someone has based
on having a loneliness score of 8
Unstandardized slope= 0.050
Y-intercept= 0.450 - answer -0.85
Which statistical test would you use?
Dr. Kelley investigated the impact of different drugs on rat's performance in a radical
arm maze. Specifically, he randomly assigned some rats to receive cocaine, some rats
to receive weed, and some rats to receive meth. All the rats were measure on the time it
took to receive the maze - answer -one-way anova
A research team wanted to investigate if personality traits predict anxiety scores. To
investigate this, the researcher collected a sample of 254 adults (53%). The participants
were measured on the outcome variable, anxiety, using the gad-7. After this,
participants completed the big five inventory, which measures extraversion,
agreeableness, conscientiousness, neuroticism, and openness
Extraversion: p = .011
Agreeableness: p = .072
Conscientiousness: p = .048
Neuroticism: p = .004
Openness: p = .152
Which of the following conclusions is appropriate? - answer -extraversion,
conscientiousness, and neuroticism are statistically significant individual predictors of
anxiety (while controlling for the predictors)
For multiple linear regression, msregression refers to ______ and ms residual refers to
____ - answer -variance predicted by the overall regression model; error in the overall
regression model's prediction
A research team wanted to investigate if personality traits predict anxiety scores. To
investigate this, the researchers collected a sample of 254 adults (53% female). The
participants were measured on the outcome variable, anxiety, using the gad-7. After
this, participants completed the big five inventory, which measured extraversion,
agreeableness, conscientiousness, neuroticism, and openness. The research team then
used these five personality traits to predict anxiety scores. Which of the following is the
outcome variable? - answer -anxiety
Multiple regression uses.. - answer -two or more predictor variables to predict a single
outcome variables
