QMB 3200 Final Exam
If the confidence interval for the regression slope includeszero, we would have some
evidence that beta
could be equal tozero, which would indicate that there may not be a relationship
between the dependent and independent variables. - ANS-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 hypothesisstatement? -
ANS-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. - ANS-True
A relationship is linear if the scatter plot of the independent and dependent variables
has astraight-line pattern. - ANS-True
Withone-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. - ANS-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. - ANS-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. - ANS-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 videogames) is equal to 6.0 years. Which of the following
would be the correct hypothesisstatement? - ANS-H0: sigma squared equals 36.0
H1: sigma squared not equal to 36.0
A Type I error occurs when performingone-way ANOVA when we conclude that the
_______. - ANS-population means are not equalwhen, infact, they are equal.
If the confidence interval for the regression slope includeszero, we would have some
evidence that beta
could be equal tozero, which would indicate that there may not be a relationship
between the dependent and independent variables. - ANS-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 hypothesisstatement? -
ANS-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. - ANS-True
A relationship is linear if the scatter plot of the independent and dependent variables
has astraight-line pattern. - ANS-True
Withone-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. - ANS-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. - ANS-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. - ANS-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 videogames) is equal to 6.0 years. Which of the following
would be the correct hypothesisstatement? - ANS-H0: sigma squared equals 36.0
H1: sigma squared not equal to 36.0
A Type I error occurs when performingone-way ANOVA when we conclude that the
_______. - ANS-population means are not equalwhen, infact, they are equal.
