MGSC 291 EXAM 2 PROFESSOR HENDRIX QUESTIONS WITH ANSWERS GRADED A+
The P-value of a hypothesis test is the probability of seeing a test statistic that extreme or
more... - Answers in the direction of the alternative hypothesis if the null is true
The interpretation of a hypothesis test result is about the - Answers parameter
what is used to form the interpretation of a hypothesis test result? - Answers statistic
power: - Answers reject the null when the null is false
type 1 error: - Answers reject the null when the null is true
type 2 error: - Answers fail to reject the null when it is false
the higher the confidence level, - Answers the wider the confidence interval
increasing the sample size will make the confidence interval... - Answers narrower
how can you increase power? - Answers increase sample size
you conducted a statistical hypothesis test and it results in a P-value of 0.10 with an α of 0.05.
You should... - Answers Fail to reject HO (do not find for HA)
if there is no zero in the confidence interval: - Answers there is probably a difference
You study whether the percent of students who go on to have successful careers is higher than
75%. Your P-value for the hypothesis test is 0.005. You should conclude: - Answers There is
strong evidence the percent of students who are successful is higher than 75%.
In regression and ANOVA, you can check which assumption(s) with a residuals versus predicted
plot? - Answers a. Errors have mean 0
b. Errors have equal variance
In regression and ANOVA, you can check which assumption(s) with a QQ plot of the residuals? -
Answers normality (normal if linear)
response variable is on the ___ axis - Answers y
predictor variable is on the ___ axis - Answers x
How is the F statistic calculated? - Answers mean sq between/mean sq within
there's no ____ in a one way anova - Answers interaction
when do you scrap data in a one way anova? - Answers when there are no significant p-values
find highest error by using... - Answers difference column with tukeys
The P-value of a hypothesis test is the probability of seeing a test statistic that extreme or
more... - Answers in the direction of the alternative hypothesis if the null is true
The interpretation of a hypothesis test result is about the - Answers parameter
what is used to form the interpretation of a hypothesis test result? - Answers statistic
power: - Answers reject the null when the null is false
type 1 error: - Answers reject the null when the null is true
type 2 error: - Answers fail to reject the null when it is false
the higher the confidence level, - Answers the wider the confidence interval
increasing the sample size will make the confidence interval... - Answers narrower
how can you increase power? - Answers increase sample size
you conducted a statistical hypothesis test and it results in a P-value of 0.10 with an α of 0.05.
You should... - Answers Fail to reject HO (do not find for HA)
if there is no zero in the confidence interval: - Answers there is probably a difference
You study whether the percent of students who go on to have successful careers is higher than
75%. Your P-value for the hypothesis test is 0.005. You should conclude: - Answers There is
strong evidence the percent of students who are successful is higher than 75%.
In regression and ANOVA, you can check which assumption(s) with a residuals versus predicted
plot? - Answers a. Errors have mean 0
b. Errors have equal variance
In regression and ANOVA, you can check which assumption(s) with a QQ plot of the residuals? -
Answers normality (normal if linear)
response variable is on the ___ axis - Answers y
predictor variable is on the ___ axis - Answers x
How is the F statistic calculated? - Answers mean sq between/mean sq within
there's no ____ in a one way anova - Answers interaction
when do you scrap data in a one way anova? - Answers when there are no significant p-values
find highest error by using... - Answers difference column with tukeys
