Increasing the sample size will usually yield a _______ confidence interval - Correct Ans-narrower
Increasing the confidence level will yield a _____ confidence interval - Correct Ans-wider
What does it mean if the R-square for a regression is 0.346 and the adjusted R-square is 0.271? - Corre...
mgsc 291 exam 3 hendrix questions and
answers graded 2024
Increasing the sample size will usually yield a _______ confidence interval - Correct
Ans-narrower
Increasing the confidence level will yield a _____ confidence interval - Correct Ans-
wider
What does it mean if the R-square for a regression is 0.346 and the adjusted R-square
is 0.271? - Correct Ans-There is a weak predictor in the model.
Standard error is interpreted with the _____ variable - Correct Ans-response
If the p-value for an F test is significant, it means that... - Correct Ans-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 - Correct Ans-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... - Correct Ans-collinearity
Collinearity is important to diagnose if you are interpreting... - Correct Ans-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? - Correct
Ans-Yes, it is significant. (0 is not contained in the interval)
Cook's D is a measure to detect... - Correct Ans-influence
Hi is a measure to detect... - Correct Ans-leverage
standardized and studentized are a measure to detect... - Correct Ans-high residual
Adding a quadratic term to a regression will... - Correct Ans-provide a test for non-
linearity
If your response is a dichotomous categorical variable, you should use... - Correct Ans-
logistic regression
formula for odds of an event is... - Correct Ans-P/(1-P)
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