A00-240試験番号:A00-240 復習解答例
試験科目:「SAS Certified Statistical Business Analyst Using SAS 9: Regression and Modeling Credential」

>> A00-240 復習解答例


NO.1 A linear model has the following characteristics:
*A dependent variable (y)
*One continuous variable (xl), including a quadratic term (x12)
*One categorical (d with 3 levels) predictor variable and an interaction term (d by x1)
How many parameters, including the intercept, are associated with this model?
Enter your numeric answer in the space below. Do not add leading or trailing spaces to your
Answer: 7

NO.2 In partitioning data for model assessment, which sampling methods are acceptable? (Choose
A. Simple random sampling without replacement
B. Sequential random sampling with replacement
C. Simple random sampling with replacement
D. Stratified random sampling without replacement
Answer: A,D


NO.3 Suppose training data are oversampled in the event group to make the number of events and
roughly equal. A logistic regression is run and the probabilities are output to a data set
NEW and given the variable name PE. A decision rule considered is, "Classify data as an event if
probability is greater than 0.5." Also the data set NEW contains a variable TG that indicates
whether there is an event (1=Event, 0= No event).
The following SAS program was used.
What does this program calculate?
A. Positive predictive value
B. Sensitivity
C. Depth
D. Specificity
Answer: B

A00-240試験準備   A00-240英語版   

NO.4 A company has branch offices in eight regions. Customers within each region are classified as
either "High Value" or "Medium Value" and are coded using the variable name VALUE. In the last
year, the total amount of purchases per customer is used as the response variable.
Suppose there is a significant interaction between REGION and VALUE. What can you conclude?
A. The difference between average purchases for medium and high value customers depends on
the region.
B. Regions with higher average purchases have more high value customers.
C. More high value customers are found in some regions than others.
D. Regions with higher average purchases have more medium value customers.
Answer: A


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