SASInstitute A00-240 問題集

質問 1：
This question will ask you to provide a missing option.
Complete the following syntax to test the homogeneity of variance assumption in the GLM procedure:
means Region / <insert option here> =levene ;
A. adjust
B. hovtest
C. test
D. var
正解：B

質問 2：
Including redundant input variables in a regression model can:
A. Destabilize parameter estimates and increase the risk of overfitting.
B. Stabilize parameter estimates and decrease the risk of overfitting.
C. Destabilize parameter estimates and decrease the risk of overfitting.
D. Stabilize parameter estimates and increase the risk of overfitting.
正解：A

質問 3：
Refer to the lift chart:

At a depth of 0.1, Lift = 3.14. What does this mean?
A. Selecting the top 10% of the population scored by the model should result in 3.14 times more events than a random draw of 10%.
B. Selecting the observations with a response probability of at least 10% should result in 3.14 times greater accuracy than a random draw of 10%.
C. Selecting the observations with a response probability of at least 10% should result in 3.14 times more events than a random draw of 10%.
D. Selecting the top 10% of the population scored by the model should result in 3.14 times greater accuracy than a random draw of 10%.
正解：A

質問 4：
Refer to the exhibit:

Which statement is true, based on the plots above?
A. Approximately ten percent of those customers with the top twenty percent of predicted probabilities are expected to have a positive event.
B. Approximately twice as many customers with the top ten percent of predicted probabilities are expected to have a positive versus negative event.
C. Approximately ten percent of a randomly selected subset of twenty percent of the customers are expected to have a positive event.
D. Approximately twenty percent of the customers with a predicted score of 3 have a positive predicted class.
正解：B

質問 5：
Which SAS program will correctly use backward elimination selection criterion within the REG procedure?

A. Option A
B. Option C
C. Option D
D. Option B
正解：D

質問 6：
The selection criterion used in the forward selection method in the REG procedure is:
A. SLE
B. Adjusted R-Square
C. AIC
D. Mallows' Cp
正解：A

質問 7：
One common approach for predicting rare events in the LOGISTIC procedure is to build a model that disproportionately over-re presents those cases with an event occurring (e.g. a 50-50 event/non-event split).
What problem does this present?
A. Only the intercept estimate is biased.
B. Sensitivity estimates are biased.
C. Only the non-intercept parameter estimates are biased.
D. All parameter estimates are biased.
正解：A

質問 8：
Refer to the exhibit:

On the Gains Chart, what is the correct interpretation of the horizontal reference line?
A. the prior event rate
B. the probability of a false positive
C. the proportion of cases that cannot be classified
D. the probability of a false negative
正解：D

質問 9：
When mean imputation is performed on data after the data is partitioned for honest assessment, what is the most appropriate method for handling the mean imputation?
A. The sample means from the validation data set are applied to the training and test data sets.
B. The sample means from each partition of the data are applied to their own partition.
C. The sample means from the training data set are applied to the validation and test data sets.
D. The sample means from the test data set are applied to the training and validation data sets.
正解：C