A non-contributing predictor variable (Pr > |t| =0.658) is added to an existing multiple linear regression model.
What will be the result?
A. A decrease in R-Square
B. An increase in R-Square
C. A decrease in Mean Square Error
D. No change in R-Square
正解:B
質問 2:
An analyst knows that the categorical predictor, zip_code, is an important predictor of a binary target.
However, zip_code has too many levels to be a feasible predictor in a model. The analyst uses PROC CLUSTER to implement Greenacre's method to reduce the number of categorical levels.
What is the correct application of Greenacre's method in this situation?
A. Clustering the levels using the number of cases in each zip_code as input.
B. Clustering the levels using the target proportion for each zip_code as input.
C. Clustering the levels using dummy coded zip_code levels as inputs.
D. Clustering the levels using the zip_code values as input.
正解:B
質問 3:
This question will ask you to provide a segment of missing code.
The following code is used to create missing value indicator variables for input variables, fred1 to fred7.
Which segment of code would complete the task?
A. Option C
B. Option A
C. Option D
D. Option B
正解:A
質問 4:
In partitioning data for model assessment, which sampling methods are acceptable? (Choose two.)
A. Sequential random sampling with replacement
B. Simple random sampling with replacement
C. Simple random sampling without replacement
D. Stratified random sampling without replacement
正解:C,D
質問 5:
Which statistic, calculated from a validation sample, can help decide which model to use for prediction of a binary target variable?
A. Chi Square
B. Average Squared Error
C. Adjusted R Square
D. Mallow's Cp
正解:B
質問 6:
What is the default method in the LOGISTIC procedure to handle observations with missing data?
A. Parameters are estimated accounting for the missing values.
B. Missing values are imputed.
C. Parameter estimates are made on all available data.
D. Only cases with variables that are fully populated are used.
正解:D
Sugimoto -
こちらのA00-240テキストは更にもう一歩踏み込んで勉強したい方向けのように思います。ありがとうございます。