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SASInstitute SAS Predictive Modeling Using SAS Enterprise Miner 14 Sample Questions:

1. Sometimes in predictive modeling we build models using a sample that has a primary outcome proportion different from true population proportion. This is usually done when the ratio of primary to secondary outcomes in a binary target variable in the population is close to which of the following?
Response:

A) 0.05
B) 1.2
C) 0.8
D) 1

2. Which statement describes the Decision Tree Split Search mechanism for categorical inputs?
Select one:
Response:

A) All levels are weighted and the weights are used for testing.
B) The levels that have target rate of 0 or 100% are re-binned first, then weighted and the weights are used for testing.
C) The average target value is calculated for each level, and then passed on for testing if it is the optimal split point.
D) A clustering mechanism eliminates observations in outlier clusters as potential split points as a first step. Then, for the remaining observations, the average target value is calculated for each level, and then passed on for testing if it is the optimal split point.

3. Which of the following sequential selection methods do you use so that SAS Enterprise Miner will look at all variables already included in the model and delete any variable that is not significant at the specified level?
Response:

A) Stepwise
B) Backward
C) None
D) Forward

4. Assume you have two equally appealing logistic regression models. Then, if you have to select only one out of these two models, you should select the one that has which of the following?
Response:

A) smaller value of SBC (Schwarz,s Bayesian criterion)
B) smaller value of gamma
C) all of the above
D) higher value of AIC (Akaike,s information criterion)

5. Refer to the exhibit:

The SAS data set retail contains information on the count of retail store sales based on the following item types: bargain, essential, gourmet, and health. Based on the results from the Cluster Profile node, which statement is true?
Select one:
Response:

A) The overall distribution of essential item sales is right skewed and Segment 4 contains stores selling higher than average essential items.
B) The overall distribution of bargain item sales is left-skewed and Segment 4 contains stores selling fewer than average bargain items.
C) The overall distribution of bargain item sales is approximately normal and Segment 1 contains stores selling fewer than average bargain items.
D) The overall distribution of essential item sales is approximately normal and Segment 1 contains stores selling fewer than average essential items.

Solutions: