QMB3250 Exam 3 UF questions n
answers passed
One-way ANOVA test null hypothesis - correct answer ✔✔M1=M2=M3=M4....
tests the difference between population means, so we are looking to see if the difference is not
equal
replicates formula - correct answer ✔✔# of experamental units
--------------------------
# of treatments
interaction null and alternate hypothesis - correct answer ✔✔Ho: Interaction is not significant
Ha: Interaction is significant
advantages of studying two factors simultaneously in an experiment?... - correct answer ✔✔a)
It is more efficient to study two factors simultaneously rather than separately.
b) We can reduce the residual variation in a model by including a second factor thought to
influence the response.
c) We can investigate interaction between factors
multiple regression? - correct answer ✔✔two quantitative variables predicting a third
quantitative variable
, two way ANOVA - correct answer ✔✔two factors
one way ANOVA - correct answer ✔✔one factor
another name for residuals? - correct answer ✔✔error
(i.e. DFE -> degrees of freedom error)
to find degrees of freedom total from an ANOVA table?... - correct answer ✔✔take the total
degrees of freedom and add 1
what does it mean if 0 is included in the confidence interval? - correct answer ✔✔that there is a
statistically significant difference
What does N and n represent in Kruscall Walis test? - correct answer ✔✔N - total number in
sample
n - number in each group
what is a dead giveaway for multicollenierity? - correct answer ✔✔when you have an overall F
statistic that shows that you have a significant model, but the p-values state that none of the
variables contribute to the model
what does it mean if there is a squared predictor? - correct answer ✔✔the shape of the line is
quadratic
what do you do with the interaction variable when using the line equation?... - correct answer
✔✔y-hat = intercept +/- X1(x1) +/- X2(x2) +/- interaction variable (x1)(x2)
answers passed
One-way ANOVA test null hypothesis - correct answer ✔✔M1=M2=M3=M4....
tests the difference between population means, so we are looking to see if the difference is not
equal
replicates formula - correct answer ✔✔# of experamental units
--------------------------
# of treatments
interaction null and alternate hypothesis - correct answer ✔✔Ho: Interaction is not significant
Ha: Interaction is significant
advantages of studying two factors simultaneously in an experiment?... - correct answer ✔✔a)
It is more efficient to study two factors simultaneously rather than separately.
b) We can reduce the residual variation in a model by including a second factor thought to
influence the response.
c) We can investigate interaction between factors
multiple regression? - correct answer ✔✔two quantitative variables predicting a third
quantitative variable
, two way ANOVA - correct answer ✔✔two factors
one way ANOVA - correct answer ✔✔one factor
another name for residuals? - correct answer ✔✔error
(i.e. DFE -> degrees of freedom error)
to find degrees of freedom total from an ANOVA table?... - correct answer ✔✔take the total
degrees of freedom and add 1
what does it mean if 0 is included in the confidence interval? - correct answer ✔✔that there is a
statistically significant difference
What does N and n represent in Kruscall Walis test? - correct answer ✔✔N - total number in
sample
n - number in each group
what is a dead giveaway for multicollenierity? - correct answer ✔✔when you have an overall F
statistic that shows that you have a significant model, but the p-values state that none of the
variables contribute to the model
what does it mean if there is a squared predictor? - correct answer ✔✔the shape of the line is
quadratic
what do you do with the interaction variable when using the line equation?... - correct answer
✔✔y-hat = intercept +/- X1(x1) +/- X2(x2) +/- interaction variable (x1)(x2)
