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
質問 2:
Given the following SAS data set TEST:

Which SAS program is NOT a correct way to create dummy variables?

A. Option C
B. Option A
C. Option D
D. Option B
正解:C
質問 3:
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 4:
A non-contributing predictor variable (Pr > |t| = 0.658) is removed from 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:A
質問 5:
Spearman statistics in the CORR procedure are useful for screening for irrelevant variables by investigating the association between which function of the input variables?
A. Logit link (log (p/1-p))
B. Rank-ordered values of the variables
C. Weighted sum of chi-square statistics for 2x2 tables
D. Concordant and discordant pairs of ranked observations
正解:B
質問 6:
Refer to the confusion matrix:

Calculate the sensitivity. (0 - negative outcome, 1 - positive outcome) Click the calculator button to display a calculator if needed.
A. 25/48
B. 25/B9
C. 58/102
D. 58/81
正解:A
Suzuki -
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