QMB 3200 EXAM QUESTIONS AND
THEIR ANSWERS GOOD FOR
REVISION
If the confidence interval for the regression slope includes
zero, we would have some evidence that beta
could be equal to zero, which would indicate that there may
not be a relationship between the dependent and
independent variables.
True
A professor would like to test the hypothesis that the average
number of minutes that a student needs to complete a
statistics exam has a standard deviation that is less than 5.0
minutes. Which of the following would be the correct
hypothesis statement?
H0: sigma squared greater than or equal to 25
H1: sigma squared less than 25
A coefficient of determination equal to zero indicates that
there is no relationship between the independent and
dependent variables.
True
A relationship is linear if the scatter plot of the independent
and dependent variables has a straight-line pattern.
,True
With one-way ANOVA, there will be a greater chance of
rejecting the null hypothesis when more variation in the data
is due to the SSB rather than the SSW.
True
Two-way ANOVA incorporates a blocking factor to account for
variation outside of the main factor in the hopes of increasing
the likelihood of detecting a variation due to the main factor.
False
The ________ measures how consistent the slope of the
regression equation would be if several sets of samples from
the population were selected and the regression equation
were derived for each of them.
standard error of the slope
A software company would like to test if the standard
deviation for the age of "gamers" (those that routinely play
video games) is equal to 6.0 years. Which of the following
would be the correct hypothesis statement?
H0: sigma squared equals 36.0
H1: sigma squared not equal to 36.0
A Type I error occurs when performing one-way ANOVA when
we conclude that the _______.
population means are not equal when, in fact, they are equal.
, The ________ measures the total variation in the dependent
variable in simple regression analysis.
total sum of squares
The test statistics for one-way ANOVA follows the _______.
F-distribution
A factor in an ANOVA test describes the cause of the variation
in the data.
True
One-way ANOVA is used when we are looking at the influence
that one factor has on the data values.
True
The ________ indicates both the strength and direction of the
linear relationship between the independent and dependent
variables.
correlation coefficient
A smaller standard error of the slope increases the likelihood
that we can establish a significant relationship between the
independent and dependent variables
True
A dependent variable, x, explains the variation in another
variable, which is called the independent variable, y.
False
THEIR ANSWERS GOOD FOR
REVISION
If the confidence interval for the regression slope includes
zero, we would have some evidence that beta
could be equal to zero, which would indicate that there may
not be a relationship between the dependent and
independent variables.
True
A professor would like to test the hypothesis that the average
number of minutes that a student needs to complete a
statistics exam has a standard deviation that is less than 5.0
minutes. Which of the following would be the correct
hypothesis statement?
H0: sigma squared greater than or equal to 25
H1: sigma squared less than 25
A coefficient of determination equal to zero indicates that
there is no relationship between the independent and
dependent variables.
True
A relationship is linear if the scatter plot of the independent
and dependent variables has a straight-line pattern.
,True
With one-way ANOVA, there will be a greater chance of
rejecting the null hypothesis when more variation in the data
is due to the SSB rather than the SSW.
True
Two-way ANOVA incorporates a blocking factor to account for
variation outside of the main factor in the hopes of increasing
the likelihood of detecting a variation due to the main factor.
False
The ________ measures how consistent the slope of the
regression equation would be if several sets of samples from
the population were selected and the regression equation
were derived for each of them.
standard error of the slope
A software company would like to test if the standard
deviation for the age of "gamers" (those that routinely play
video games) is equal to 6.0 years. Which of the following
would be the correct hypothesis statement?
H0: sigma squared equals 36.0
H1: sigma squared not equal to 36.0
A Type I error occurs when performing one-way ANOVA when
we conclude that the _______.
population means are not equal when, in fact, they are equal.
, The ________ measures the total variation in the dependent
variable in simple regression analysis.
total sum of squares
The test statistics for one-way ANOVA follows the _______.
F-distribution
A factor in an ANOVA test describes the cause of the variation
in the data.
True
One-way ANOVA is used when we are looking at the influence
that one factor has on the data values.
True
The ________ indicates both the strength and direction of the
linear relationship between the independent and dependent
variables.
correlation coefficient
A smaller standard error of the slope increases the likelihood
that we can establish a significant relationship between the
independent and dependent variables
True
A dependent variable, x, explains the variation in another
variable, which is called the independent variable, y.
False
