HSCI 345 Exam 3 UPDATED QUESTIONS
AND CORRECT ANSWERS
What is a way of measuring the extent to which two variables are related, measures the
pattern of responses across variables, helps determine whether as one variable increases, the
other increases, decreases, or stays the same
Determines these patterns can be calculated with covariance - CORRECT
ANSWER correlation
What is it called when one variable increases the other variable increases - CORRECT
ANSWER positive relationship
What is it called when one variable increases the other variable decreases? - CORRECT
ANSWER negative relationship
What is it called when one variable changes the other variable does not change? - CORRECT
ANSWER no relationship
The distance of each person's value from the mean value - CORRECT
ANSWER deviance
What tells us by how much scores deviate from the mean for a single variable? - CORRECT
ANSWER Variance
This tells us by how much scores on two variables differ from their respective means? -
CORRECT ANSWER covariance
Equation for variance - CORRECT ANSWER
This calculates the error between the mean and each subject's score for the first variable? It
calculates the error between the mean and their score for the second variable? This multiplies
, these error values and adds these values, where you get the cross product deviations. This is
the average cross-product deviations. - CORRECT ANSWER Covariance
equation of covariance - CORRECT ANSWER
Upon the units of measurement; or a solution of a problem is to standardize the covariance; or
the standard version of a covariance is called a correlation coefficient - CORRECT
ANSWER These are problems of covariance
There is one predictor variable and one criterion variable, these predictor and criterion
variables are at least interval or ratio LOM and the participants are measured for the predictor
and criterion variable one time are known as - CORRECT ANSWER the rational for
using a correlation and which correlation is appropriate
What are the characteristics of the R-Distribution - CORRECT ANSWER Unless the r
is 0, the sampling distribution is negatively skewed, R cannot take on values greater than 1.0
or less than -1.0
Distribution cannot extend as far in one direction as it can in the other
Covariance is in the standardized metric, the r value obtained through this for the test
statistic, it varies between -1 and +1m 0 = no relationship, the coefficient of determination,
r^2. By squaring the value of r you get the proportion of variance in one variable shared by
the other - CORRECT ANSWER Effect size
This is the ___________, where the causality between two variables cannot be assumed
because there may be other measured or unmeasured variable affecting the results -
CORRECT ANSWER Third-variable problem
The correlation coefficient say nothing about this variable that cause the other to change -
CORRECT ANSWER direction of causality
What measure the relationship between two variables controlling for the effect that a third
variable has on only one of the others - CORRECT ANSWER partials
AND CORRECT ANSWERS
What is a way of measuring the extent to which two variables are related, measures the
pattern of responses across variables, helps determine whether as one variable increases, the
other increases, decreases, or stays the same
Determines these patterns can be calculated with covariance - CORRECT
ANSWER correlation
What is it called when one variable increases the other variable increases - CORRECT
ANSWER positive relationship
What is it called when one variable increases the other variable decreases? - CORRECT
ANSWER negative relationship
What is it called when one variable changes the other variable does not change? - CORRECT
ANSWER no relationship
The distance of each person's value from the mean value - CORRECT
ANSWER deviance
What tells us by how much scores deviate from the mean for a single variable? - CORRECT
ANSWER Variance
This tells us by how much scores on two variables differ from their respective means? -
CORRECT ANSWER covariance
Equation for variance - CORRECT ANSWER
This calculates the error between the mean and each subject's score for the first variable? It
calculates the error between the mean and their score for the second variable? This multiplies
, these error values and adds these values, where you get the cross product deviations. This is
the average cross-product deviations. - CORRECT ANSWER Covariance
equation of covariance - CORRECT ANSWER
Upon the units of measurement; or a solution of a problem is to standardize the covariance; or
the standard version of a covariance is called a correlation coefficient - CORRECT
ANSWER These are problems of covariance
There is one predictor variable and one criterion variable, these predictor and criterion
variables are at least interval or ratio LOM and the participants are measured for the predictor
and criterion variable one time are known as - CORRECT ANSWER the rational for
using a correlation and which correlation is appropriate
What are the characteristics of the R-Distribution - CORRECT ANSWER Unless the r
is 0, the sampling distribution is negatively skewed, R cannot take on values greater than 1.0
or less than -1.0
Distribution cannot extend as far in one direction as it can in the other
Covariance is in the standardized metric, the r value obtained through this for the test
statistic, it varies between -1 and +1m 0 = no relationship, the coefficient of determination,
r^2. By squaring the value of r you get the proportion of variance in one variable shared by
the other - CORRECT ANSWER Effect size
This is the ___________, where the causality between two variables cannot be assumed
because there may be other measured or unmeasured variable affecting the results -
CORRECT ANSWER Third-variable problem
The correlation coefficient say nothing about this variable that cause the other to change -
CORRECT ANSWER direction of causality
What measure the relationship between two variables controlling for the effect that a third
variable has on only one of the others - CORRECT ANSWER partials
