MGSC 291 EXAM 3 HENDRIX QUESTIONS
Increasing the sample size will usually yield a _______ confidence interval - Answers -
narrower
Increasing the confidence level will yield a _____ confidence interval - Answers -wider
What does it mean if the R-square for a regression is 0.346 and the adjusted R-square
is 0.271? - Answers -There is a weak predictor in the model.
Standard error is interpreted with the _____ variable - Answers -response
If the p-value for an F test is significant, it means that... - Answers -at least one
predictor is important to the model
When using a regression model for prediction, one should be concerned with minimizing
_____ of the regression - Answers -standard error
You run a multiple regression that has a low P-value for the F-test, and large P-values
for each of the predictors. You should suspect... - Answers -collinearity
Collinearity is important to diagnose if you are interpreting... - Answers -the regression
coefficients
The confidence interval for a predictor's coefficient is 56.65 < β1 < 88.72. Based on the
confidence interval, could we tell if the P-value is significant for that predictor? -
Answers -Yes, it is significant. (0 is not contained in the interval)
Cook's D is a measure to detect... - Answers -influence
Hi is a measure to detect... - Answers -leverage
standardized and studentized are a measure to detect... - Answers -high residual
Adding a quadratic term to a regression will... - Answers -provide a test for non-linearity
If your response is a dichotomous categorical variable, you should use... - Answers -
logistic regression
formula for odds of an event is... - Answers -P/(1-P)
What does the complete second order model include? - Answers -linear and quadratic
terms for two
quantitative predictors along with the interaction term
Increasing the sample size will usually yield a _______ confidence interval - Answers -
narrower
Increasing the confidence level will yield a _____ confidence interval - Answers -wider
What does it mean if the R-square for a regression is 0.346 and the adjusted R-square
is 0.271? - Answers -There is a weak predictor in the model.
Standard error is interpreted with the _____ variable - Answers -response
If the p-value for an F test is significant, it means that... - Answers -at least one
predictor is important to the model
When using a regression model for prediction, one should be concerned with minimizing
_____ of the regression - Answers -standard error
You run a multiple regression that has a low P-value for the F-test, and large P-values
for each of the predictors. You should suspect... - Answers -collinearity
Collinearity is important to diagnose if you are interpreting... - Answers -the regression
coefficients
The confidence interval for a predictor's coefficient is 56.65 < β1 < 88.72. Based on the
confidence interval, could we tell if the P-value is significant for that predictor? -
Answers -Yes, it is significant. (0 is not contained in the interval)
Cook's D is a measure to detect... - Answers -influence
Hi is a measure to detect... - Answers -leverage
standardized and studentized are a measure to detect... - Answers -high residual
Adding a quadratic term to a regression will... - Answers -provide a test for non-linearity
If your response is a dichotomous categorical variable, you should use... - Answers -
logistic regression
formula for odds of an event is... - Answers -P/(1-P)
What does the complete second order model include? - Answers -linear and quadratic
terms for two
quantitative predictors along with the interaction term
